Yes it sounds a bit like what I did [X(] I did it in 3 stages and 2 tanks went through before I fully opend it .. Glad to see I sort of did it right..LMAO.. I have began tuning am i right in saying that there are 3 tuning screws.
the biggest on the side is the carb intake .the top one is the top end fuel input . and the bottom spring loded one is the low end and idel?

I have it runing 96% good just another 10 mins tomorrow and I think I will have cracked it.. But it does help is you know exhactly what you are tuning.