can anyone recommend a person in LA area to pay to install a tricky Koetsu cartridge

@amg56, that’s exactly what I did, many times watching Brooks install, align, measure, adjust, then run-in the cartridge for hours on the customer's table/arm,. Then retest and realign the cartridge (all the alignment parameters change as the suspension relaxes). I’ve never seen any other retailer expend as much time and effort as did Brooks, nor with as much care and expertise, and Brian Berdan does the same. All that work is included in the sale price of the cartridge.

AFAIK Jay Nakamura makes house calls, Randy Cooley has his number. Jay has been around for eons and ton of experience setting up tables/carts

Thanks for all the good ideas....was a bear to get done today and david swore mightily how much a pain the koetsu the helius arm and rock 7 combo was to install together.....

Sounds great though 😁