I no longer have the manual for my oldest TT 46, but I certainly recall reading an engine test many years ago that convinced me to buy my first one. That was either 1992, or 1993. The tester (I don't remember who it was) described the engine in considerable detail, & among other things he noted the nickel-plated liner & speculated about its longevity. The price was so much better than the OS engines at the time that I decided to take a chance on one.

I had five OS 46 SF's at that time -- 4 ABC's (actually ABN's) & a ringed SF. The TT 46 absolutely blew them away. I had no trouble with the SF's, but I replaced them with a pair of FX's & a growing collection of TT 46 Pro's. Needless to say, I no longer have any FX's, but I still have every one of the TT Pro's, including the one that ingested its rear bearing. I cleaned the loose metal bits out, replaced the bearing & away it went. Despite scratches on the piston & many dents on the cyl head & piston crown, plus >100 hrs, it is still more powerfull than a quite-new MECOA 46 Tomcat.

I'm a believer.