Corey Posted December 2, 2019 Report Share Posted December 2, 2019 7 hours ago, lonbordin said: @Corey Maybe I didn't make it clear. The X-ray is not me, that image is for illustrative purposes of what I think is correct. The blue dot is where my ankle joint is in my UPZs. Yeah, I know that's not you. A quick trip to Walmart reveals the variety of the human body, but I never would have imagined THAT much difference in bone structure from person to person. With a foot installed, does the tongue sit quite far forward of where it does when just closing the boot without a foot in it? I can't imagine having enough room for tendons and flesh if the center of rotation of the talus and the tibia is that far forward and up. Seems more likely that you have a measurement error. Did you use a bandsaw to figure it out? Quote Link to comment Share on other sites More sharing options...
lonbordin Posted December 2, 2019 Author Report Share Posted December 2, 2019 (edited) 9 hours ago, Corey said: Yeah, I know that's not you. A quick trip to Walmart reveals the variety of the human body, but I never would have imagined THAT much difference in bone structure from person to person. With a foot installed, does the tongue sit quite far forward of where it does when just closing the boot without a foot in it? I can't imagine having enough room for tendons and flesh if the center of rotation of the talus and the tibia is that far forward and up. Seems more likely that you have a measurement error. Did you use a bandsaw to figure it out? I appreciate the role of a skeptic @Corey! Enough room? The tongue of the UPZs is curved and offers room. Exhibit A: The players (shell w/o cuff, liner, footbed, and bootboard): So I put the boot board (standing in for the bottom of my liner) and the footbed into the shell. Then I placed my foot into the shell and felt the ankle joint by way of my fingertip (noting it's location) to place the blue dot. In the picture of "the measurement" below the tip of my finger is on my ankle pivot. "The measurement": No bandsaw required. Edited December 2, 2019 by lonbordin I guess I should've taken a picture of my finger to prove it's not ridiculously long. :-D Quote Link to comment Share on other sites More sharing options...
SunSurfer Posted December 2, 2019 Report Share Posted December 2, 2019 Don't equate the bony prominence of your ankle with the centre of rotation. The video and Corey's circled x-ray image show the COR to be significantly lower. Quote Link to comment Share on other sites More sharing options...
lonbordin Posted December 2, 2019 Author Report Share Posted December 2, 2019 21 minutes ago, SunSurfer said: Don't equate the bony prominence of your ankle with the centre of rotation. The video and Corey's circled x-ray image show the COR to be significantly lower. The location of my fingertip is just below my inner protuberance of my medial malleolus which is certainly proximate to the talus joints center of rotation. The subtalar joint is not really in play here. 1 Quote Link to comment Share on other sites More sharing options...
SunSurfer Posted December 2, 2019 Report Share Posted December 2, 2019 You're the guy on the spot, who knows exactly what he's feeling and touching. I'm just guessing from the photos and heckling from the sidelines. Hope you solve your pain problem. 1 Quote Link to comment Share on other sites More sharing options...
lonbordin Posted December 2, 2019 Author Report Share Posted December 2, 2019 6 minutes ago, SunSurfer said: You're the guy on the spot, who knows exactly what he's feeling and touching. I'm just guessing from the photos and heckling from the sidelines. Hope you solve your pain problem. No worries. I'm appreciative of the skeptic.... I probably should've been more technical and detailed from the start. If only I had access to an x-ray machine but this is America where they charge you just for looking at one.... Quote Link to comment Share on other sites More sharing options...
Beckmann AG Posted December 2, 2019 Report Share Posted December 2, 2019 (edited) 1 hour ago, lonbordin said: If only I had access to an x-ray machine but this is America where they charge you just for looking at one.... I've a portable, and you can look at it for free. Might even have some film, but I'm sure the chemicals are long expired. As mentioned previously, I've moved rivets to, (or closer to) the node of the medial malle0lus, and the boots work 'better' that way. 'Better' being somewhat subjective in terms of goals/outcome, and predicated on the notion that the boot/shell is a means of supporting the efforts of the lower extremities, rather than a hammer wielded by same. Edited December 3, 2019 by Beckmann AG Quote Link to comment Share on other sites More sharing options...
lowrider Posted December 6, 2019 Report Share Posted December 6, 2019 What would be the view of a boot that is hinged at the back on the lower Rab mechanism abomination or acceptable ? Quote Link to comment Share on other sites More sharing options...
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