Well...
Yes, the OS bridges on my '73 4001 and my '01 COY 4003 are, indeed, a PITA to adjust. But, they are relics of the time when Ricks came from the factory with flat wound strings. Once they were set up how you wanted them? They stayed that way for... well, a long time. So, if you are somebody that changes strings a lot - either because you want to - or you play rounds, and
have to? Yeah, a Rick bridge is a pain. But, personally? Since both of mine wear flat wounds, that's a pain I only had to suffer once - long ago, in a galaxy far, far away...
^This^. There are various reasons why Rick basses have "tail lift". Sometimes it really isn't; it's simply that the bottom of the tailpiece is flat - but the bass's body isn't. Sometimes, it's the other way 'round. That's uncommon, though. IMO, it's mostly caused by the hidden screws that hold the tailpiece down (they're under the bridge) not being tight enough. If the screws you
can see are not real tight, either? Then, the string's tension can lever the tailpiece up, and over time? Yes, you'll get "tail lift". The tailpiece used to be an aluminum casting, and tail lift wasn't ever a thing. When they switched to a zinc alloy casting (like a toy cap pistol), Rick had 2 extra screws to hold it down. Again, no tail lift. But, people thought that was ugly; so, Rick deleted the 2 screws that went through the back of the tailpiece's top. That's when tail lift began... Both of my Rick's
do have a little lift; they came to me that way. But, since I took them apart after I got them - and tightened
all the screws? It's never gotten any worse. Both have just enough lift, that I can push a credit card under the back edge of the tailpiece. But, I have to sort of force it under there... Since my 4001 is 51 years old this month - and has the same tail lift as the 23 year old 4003? I think my theory is valid...
And, while the tailpiece in the picture
is a "Fakenbacker", there
are Rick Tailpieces that can - and do - fold up that way. But, 99.5% of the time, they're the black ones, on some older Ricks. The reason why? Those tailpieces are powder-coated, and the 300+ degrees that it takes to powder coat something, is too much heat for a zinc casting to tolerate. It messes with the zinc, and robs it of what little strength it has to start with...