Transition of Topspin against different spins

Hi,

I really enjoyed watching your DVDs (training secrets revealed and serving secrets revealed) and your DVDs and free lessons helped me to improve my game a lot!

However, I would like to ask you one question. I can hit about 40-60 FH topspins against a no spin ball (a robot feeds balls), about 30 times of FH topspins against a backspin ball and only about 4-6 times FH topspin against a medium/heavy topspin ball. This stroke is very inconsistent atm. However, I have no problems if I counterhit the ball (I can hit 70-100 times of FH counterhit in the row) and because of that when I topspin the ball against a backspin ball and if opponent returns the ball with a block I have a big trouble, because I try to topspin it and not counterhit it (it is strange that when they block the ball it has some topspin so the ball goes off the table). Would you suggest me to improve my topspin against backspin, so they can't return it or would you suggest me to counterhit the ball instead of trying to topspin it or would you suggest me to practise topspin against topspin?

 I have the same problem with my backhand as well. 

Or maybe the problem is in my equipment? My blade is really fast (OFF+) and my rubbers are Hexer (it is like Tenergy, but a little bit slower and has more control). However, even before I changed my bat I had the same problem and it seems that this new bat has more control.

By the way, I really love reading the blog and watching PingPods, you should do more of them :)