I will tell you guys, I have about had it with this hw95. I ordered a Vortek PG4 kit, but it seems like the plastic coil guard is too large for the inner diameter of the piston. The piston appears to have an inner metal sleeve that prevents me from sliding the coil in. What do you think? anybody else had this issue?? I don't think Vortek has the right phone number listed. They haven't answered the phone for days and are not responding to my emails.