I walked into antique shop today and up on a tall shelf sat a fully built bright orange Robbe Sea-Wolf V2 lol so I nabbed it for 90$. No radio and super old electronics inside (like a FP-MC108 speed controller) but I have everything here to bring it up to date. I have ZERO sub knowledge but I've always wanted to get into it someday. I've been everywhere else in RC, boats, battleships, tanks, cars, etc. I have a question I cant seem to find elsewhere on the web. There's a valve on top I used about 1-2 PSI of air pressure to check for leaks and it seems good. Should you put some PSI into the WTC before you use the sub to help hold the water out or for other reasons? Is there any reason to or to not do this etc.?