There's a lot of questions to be asked here. Are you testing/adjusting these yourself? What kind of tools or diagnostic equipment are you using? Do you have the adjustment/repair procedures for these particular stages?
I tried converting a BP/W to a SM and failed miserably. I eventually bought a Hollis SMS75 and kept the BP/W as a BM. If you're serious enough about SM, get a proper rig if taking this on yourself, so you can concentrate on learning SM. It will be a hell of a lot easier on you.