Just be sure to Google Search your Modder prior to spending your hard earned money. Google their names to see if others has had problems and check out how quickly they handled issues and how cordial they are in doing so. A Modder who runs into problems, like Reference Audio Mods had in my experience. Kyle, who doesn't have ANY EE educational background and very limited experience in parts swapping at his mother's kitchen table took 6 years of MY time solving their issues, offering endless excuses for their incompetence. Oh yes, how warm and friendly they are at first to get your money, but fail as honorable businessman on how they handle refunds with defective mods.
Endless phone calls, emails and finally humiliating RAM in these forums to realize satisfaction for the $25000.00 "World Class System" Klye designed for me. They stuck me with a defective Player, miss wired Silver Rock TVC selector switch mod, blown speakers and a crappy custom Carver Amp that failed and all were repeatedly returned again and again defective. Stating all these pieces sounding wonderful at Kyle's fathers house. In the case of the Silver Rock, the transformers were actually wired backwards and even the RCA's were wired opposite of each other howling like a dog but sounded wonderful to him. Actually, it was absolutely impossible that it was even tested before returning. Kyle's incompetence was inconceivable! The misery I went through, the money I spent on Kyle's inappropriate suggestions, not to mention the most expensive parts money can buy must have made him a pretty penny. BTW, my stock Oppo 83SE completely stomped Kyle's $3500 Marantz complete with his $900 silver wound Transformer output coupling mod. In today's world there are HUGE advancements in discrete output and modern circuitry that makes these ULTRA EXPENSIVE PARTS ABSOLUTELY RIDICULOUS!!
So, the bottom line here is... PLEASE Google Search your MODDER!!!