First, I've been on RC Tech for over 2.5 years, and originally got involved in RC over 35 years ago. Second...and more importantly (not to mention, more appropriate to this thread)...I just acquired two TT-02 kits...one for me, and one for my step-dad. While my Step-dad does have two other RCs (2WD Traxxas Slash, ProBoat Recoil 17), he has never built a kit. The TT-02 will be his first kit. However, instead of just getting a kit for him to build, I thought it would be fun for us to build our own, separate, kits side-by-side. Although, in typical 'Black Cat' fashion, both will have a few upgraded parts right off the bat (oil-filled shocks, bearings, and some other goodies). Mine, however, will be upgraded considerably more than his, as I have secondary plans for mine - racing. I've already acquired most of what I'll need (including the High-Speed Gear Set), while other parts are either on their way, or will be ordered soon. HOwever, there are two things I could GREATLY use some assistance on.

First, starting with the aforementioned High-Speed Gear Set, I know there are other-branded spur gears that will fit the spur adapter...but, I do not know which. I know the stock spur is .6Mod, but I'd prefer to go with 48P. What quality...and, I do want to emphasize 'quality'...48P spur gears will fit the High-Speed Spur adapter? Associated? Kimbrough? Others? Second has to do with an 'alternate' parts upgrade route I am considering, namely the Yeah Racing TATT-S04 Competition Touring Car Upgrade Kit. Is this a good/smart idea? Or, should it be avoided? I know that most parts from Yeah Racing are quite good...but, I also know some of their stuff is "just ok", and some should be left alone. I'm not concerned with the price...just the quality, and length of usability. An input would be appreciated.