Accuphase distributors are notorious for refusing to service units purchased out of country.
Your plan is a great idea if a) you have access to a local tech qualified to service / modify Accuphase products, or b) you yourself are that person.
If you’re in a browsing mood, check out www.hifido.co.jp/. Their website looks terrible, but if you read about the company you’ll find that they are very well respected.

