Re: Double Bass Pedal issue
Here is how you check the driveshaft. With your left hand, grab the cam assembly on the slave pedal. With your right hand, move the left beater back and forth. If you can move the beater more than 1/4" (about 6mm), your driveshaft is worn out. As others have stated, the extra mass will effect the slave to some degree, but a worn out driveshaft will only exaggerate the problem. A properly functioning driveshaft should overcome the extra mass and be hardly noticeable at all while being played.
Wanted: GURU 13x7 Segmented English Ash & Ovangkol with Ovangkol Segmented Hoops