Well not wanting to look like i'm siding with Tekin but i run Tekin RS Pro in my Tamiya TRF502X, TRF201, my sons TRF201 and Durango DEX410 and i can honestly say that i've not had 1 instance of problems or bother with any of these speedos. I think that they're genuinely the best out there at the moment and the size of the speedo is what attracted me to it especially TRF502X and Durango, not much room. In any walk of life there's people who unfortunately don't get on with certain products, Hell i ran LRP Speedos for years and then went SXX Stockspec and absolutely hated it, hence the reason i'll never touch another LRP speedo.
I hope you get to the bottom of the problem.
Scotty......../
