Hi dude, I've replied to your post on my visitor page,
18 PSI is what you're aiming for and are currently running so that good, leave it there, if you wastegate is stuck then you maybe getting 18psi because you've added the extra fuel. As for the boost controller, it needs to go between the wastegate and a boost source of somekind, best place is on the compressor housing where the original hard pipe is connected,
Also, you want to screw you boost compensator in wards, (clockwise) I know this contradicts what what other people say but this way you will get less off boost smoke, and more power (after you've added some more on the max fuel screw) put your boost compenstator screw all the way in then screw it out 2 whole turns then go from there, you may have less power to start with but then dial in about 20 degress more max fuel after that and you should be good to go
A friend of mine achieved a relatively smoke free tune on a lucas pump, and a K14 turbo running 18psi and got 130 hp and 200 lbft with just a decat and standard exhaust.
What turbo is on yours?
Also if you need help with anything you only live 30 mins away from me