Last month, I posted issues with a low brake pedal after installing new drums, shoes, wheel cylinders, star wheel adjusters and hardware. The only thing I did not replace was the backing plates and push pins on the wheel cylinders. I found 2 leaks: one where the line tees off to front and rear brakes and the other at the brake light switch. I tightened both - no leaks but still low brake pedal. I did hear a slight drag on the right front wheel.  I attempted to make an adjustment but could not turn the star adjuster. I did notice that when I pressed down on the star wheel adjuster with a screwdriver the wheel would spin freely and when I remove the pressure on the star adjuster, the wheel would barely turn. Yesterday I raised the front end to replace an oil pressure switch and decided to look at the right front brake while I had the car up. I removed the drum and noticed that the lower spring was hitting the star wheel and the wheel was at its minimum adjustment - all the way in. When I tried to reinstall the drum it would not go on. I had another new star wheel adjuster that was smaller and shorter then the one I had on. I installed the smaller one and installed the drum and wheel. The wheel turns when I turn it but stops as soon as I stop. The brake pedal is better. There is no other adjustment I can make to correct this issue. 
Can I either install shorter wheel cylinder push pins or grind down the ones I have to make the brakes adjustable? Can I shorten the star wheel adjuster by grinding down the non-threaded piston and collar? I think this will make the brakes adjustable and hopefully correct my brake pedal issues.