Nice design, problematic manufacturing - Tipton Standing Ultra Gun Vise

I have been looking at this product for a while and finally purchased it on the Black Friday sale.
I love the design. The frame is more sturdy than I expected. As others have said, the plastic knobs and plastic threads leaves something to be desired. My real problem is with the manufacturing and QC. I have seen better molding and bonding assembly from $2 products of dubious orgins.I should not have to take a Dremel tool to the mounts to make the sliding post operate properly. The mold used had the same defect on both bases. The post would not slide through the base at all (maybe with a hammer). For the threaded plastic knobs, a little plumbers silicon grease helped.