Stumbled across this place and thought I might hang my hat a while. Just picked up a pristine 400 and ready to make her shine. I see I can get a lot of advice and have some studying to do for the next couple days. This will be my first amp mod...and i want to get it right the first time. Have had a couple hacks butcher up some fine equipment in my past and am done going that route.
I think you have the right attitude. I'm 62 and have almost never paid to have anything built or repaired. I'd rather buy books and or take classes and buy the necessary tools to do it right.
Now there is youtube and that is WAY better than walking five miles to the library because my transmission went out!
I think DIY is making a YUUGE comeback!
If I can't be handsome, I can surely be handy.