I think the Tilt all is a terrific tripod for a LIGHT 4X5 camera. If you think a Sinar is light more power to you.
If you go for a Tilt All look for the original Marchioni bros. variety these came ONLY in a highly polished aluminum. Black one were introduced after Leitz bought them out.
I would look for a USED Gitzo three series tripod, Aluminum. In the olden days they were called "Studex" There were several models, depending on the features wanted.
The Studex was three sections, Studex COMPACT, four sections, similar height, No low level. COMPACT PERFORMANCE, four sections w/low level. There was also a version with a crank center column called cremaleleir(sp). All have interchangeable center columns EXCEPT the one I can't spell. The weak point is the same as the Tilt All, the inserts used in the legs can wear and Sand in the locks will jam both of them.
The next step up was the Interpro Studex these ALL had interchangeable center columns including the crank column guy.
These will ALL easily handle the Sinar and most 5X7 cameras, some light 8X10's.
Next step is Pro Studex, Pro Studex Perfomance etc.etc.
The biggest problem with these is, You can't break 'em. You can run them over with a car & they'll bend and no longer work, but you can't break them. The CF's can be broken.