Manual Boost Controller question

[95white240sx]

Hey guys real quick need some ideas to see if I'm crazy or not lol. I bought one of them cheap ass MBC on Ebay knowing its junk $10 gets crap. Its a needle in it so not regulating crap I had 7 psi closed boosting off the waste gate and opened until any change I got 19 psi. Its the rectangle one so knob on top and 2 barbs on the bottom.
Here is my idea take the needle out and bore out the inside of the controller a hair. Pick up a ball bearing that is a tight fit but not so tight it cant move. Place a spring on top of that followed by another bearing. Flatten off the peak of the needle.
Bottom barb runs to my pressure supply IE hot pipe and top barb runs to the waste gate. In theory it should now work like a normal MBC the tighter (less slack on spring = less boost) Loosened (more slack = more boost)?

Please tell me I'm not crazy lol