hi stella-d,
i've heard of the walker p/s, but have never even *seen* one, let alone auditioned it. the hi-end press seems to like it, tho... ;~) do you still keep your original motor w/it? w/the o-l mod i did, it also replaces the motor. for a couple hundred dollars more, there's a supposedly even *better* p/s one could get... i'd seriously check out their info on their www &/or email mark baker - i don't see how you can get near their mod for the price, even used.
regards, doug
ps - vpi also has a p/s that has gotten reviews similar to the walker - again, serious money, & again, i believe ya keep the original motor.