55.2-59 Gas tank sender problem

[iceman4]

About 3 years ago I installed a CCP rear mount tank and their 30 ohm universal sender and a new replacement gas gauge. Well... it never worked properly. The needle on the gauge would sluggishly show 3/4 with a full tank and just below 1/2 when empty. I studied the threads on the subject and ruled out the usual suspects, proper grounds,ect.. Finally pulled the tank. Plenty of clearance for the arm to move in the tank. When the float arm is manually moved from full to empty the gauge works perfectly! The arm on the sender binds slightly,enough to prevent it from moving thru its full range in the tank.
Not sure if I should try to fix or just buy a replacement. Hate to reward the manufacturer by buying a second to replace their poorly made product.
Has anyone had a similar problem with an aftermarket sender?