The 847 is actually a fine sounding wah.
Do everything you can to play well with it... and more. Good advice from Ed.
However, if you wish to expand on it. There's plenty of things to do... search SOFT for a listing.
I had 2 v847s before. 1 stock. 1 modded with True Bypass and a Fulltone pot.
Of course, the true bypass was like... obvious. Don't need to elaborate on that. Its not like the diff between a TB-ed DS-1 and stock bypass DS-1.
Both had the same tones - same circuit board with same stuff...
But!!! The Feel dammit. The fulltone pot (or substitute with whatever you have in mind) and the stock vox pot was quite a big diff in feel. The fulltone's sweep just felt way more natural to me. Very cool difference.
Experiement lah. At the end, all this hearing and saying... go listen and tweak yourself.