What I do like about the TX is that its so easy to strip and do a simple degrease and re lube compared to HW models. Rember the TX piston has already been fitted with the delrin rings a modification which you would pay around £150 on other guns so its already tuned to the equivalent of a v glide.
But although ive never short stroked I never hear negative reviews. You could try a titan xl spring these tend to be slightly stiffer and faster compared to the factory fitted. TX also tend to be under powered usually a titan spring will bring it up nearer to the legal limit sometimes just over so you will need to check.
You may find it less hold sensitive if its firing cycle is faster.