MM GB LP Ensign Question

1. How good were Ensign parts - dealer says not as good as IMPCO, but I wonder? Clearly Ensign is no longer there and he can get IMPCO.
2. How likely are various parts to need replacement - assuming tractors not run for several years? Is regulator most likely problem and other things relatively simple in comparison?
3. I had heard there was someone out there hand making refurb kits, particularly for regulators - can anyone give me details?

Ordered Model R regulator kit $70; filter $15

Obviously I'd like to have gotten more for $70 - kit included 2 diaphrams with correct shape and mounting hole patterns (high pressure did have center hole, but not low pressure), 4 special gaskets (1 for each side of diaphram), large shaped rubber piece, and a couple of smaller gaskets. All pieces are matched to geometry but no metal parts included.

Would like to have new springs and everything, and certainly better if metal installed on diaphram as I hate to cut the low press to install center, but I guess all things considered, its worth the $70 to me compared to the options. Hope to have it running in a day or so.

P.S. GB's and U are 8059 Model R regulators; filters are model 6257; Economizers are 8628 on GB's but U only has plug that adjusts it - no vacuum line or diaphragm. Carbs aren't marked as far as I can see, but book says 7595 KGL (1 1/4") for GB and 7593 KGL (1") for U. I think thats consistent with everything else I've got, but there may have been 8059 Model R regulator changes at regulator s/n 48372 - anyone know what those were?

Thanks again. Ed