I actually have pretty good feedback to share on this... I bought the remaining inventory from the guy that does these about 3 years back. We initially had a verbal agreement about me taking over the turboplaten business and we discussed the process in detail while loading a truck full of typewriters, but as the day wore on he seemed a little reluctant and when we started getting into inner/outer diameter measurements and specific PVC tubing he kinda clammed up. *For the record, I wasn't put out by it really as I had virtually zero intention of starting a platen business and told him as such- that any I made would likely only be for machines I sold. But it definitely felt weird as he literally gave me his custom built lathe and much of his tubing stock. 🤷🏻‍♂️ That said, I know how to make these from start to finish. The quality is decent enough, and the ones I got from him and the ones I made myself perform pretty well for the most part. However, I found some machines react poorly to the different material - causing escapement skip. The PVC material is bouncier than natural rubber, and doesn't play well with ALL typewriters without being specifically messed with during construction. His method of heat treatment of the tubing is what's supposed to combat this, but it's almost impossible to gauge the amount of heat needed for various machines specific escapements. All that to say; They're an interesting concept in theory, and given the right equipment could be a compelling alternative for natural rubber. But given what I saw and experienced in the process, I'd have a difficult time justifying paying essentially twice what JJ Short charges for one. Not saying you shouldn't, just sharing my experience.