Using .33 over .22 allows for slightly lower frequencies to come through. It's OK if you have a "rumble" or "low" filter when spinning vinyl. Otherwise keep the .22 caps, just use "better" sounding ones.I restored two of these but left the green chiclett caps. I may have to give the Mundorf's a go. Do you happen to remember the reason for going with .33uf caps instead of the .22uf's?