Thank you very much for ur advice!!!!! Would u like to accept my add-friend request? I hope I can ask you more questions in the future.

Thanks a lot for ur advice! its really worked!!! When I encountered this problem (the first piston rebounds slowly), someone told me that is a defect of MW2250.I mean, his words tend to make me belive that all 2250 have such problem, beg me pardon,sir, have u ever heard of something similar? To be ...

The first piston of my MW 2250 always rebounds slowly when blowing. Could anyone please tell me how to fix it