I liked the Mod54 a lot, very well thought out and simple design. However I sold it due to the fact that the super thin base of Rollei IR 400 makes the film jump out of the slots no matter what I did.

So I now use a Jobo 3010 drum and plan on getting a second...it is that good, even on a simple roller base which it sounds like you have. Just cut out the BS, buy a clean Jobo 3010 drum, use it on your roller base and prepare to see the finest negs you have ever set eyes on. The results from the 3010 drum blows away everything, even what you get from a Mod54.

With film being $1-2 per exposure, cut to the chase and get it right the first time...