Sorry, but how can a reel "optimise" the results. What kind of problems do you have with stand development? Chances are that whatever problems you have are caused by stand developments itself, not your reels.
There are Hewes reels that are made for Paterson tanks, with a bigger diameter to fit the column. If you can compromise and deviate a little from the stand development regimen, and do minimal agitation instead, you don't need to buy those expensive reels.
There is! When using 120 film and the camera or the film holder (as the Linhof Rapid Rollex) is placing the negative very close to the edge of the film, a plastic reel will touch the edge of the image during development and the friction causes increased density - very anoying if you want to print the full negative.
This is what it looks like - took me a long time to find out why: