I have the HZX45-IIA Shen Hao model camera, it does not have rear standard focus capability. It does look in the pictures as though it does, but the metal channel is there to allow you to slide the rear forwards to allow you to use short focal length lenses without having the front of the camera getting in the way. That rear knob, allows you to lock the rear standard in place.
I have a Schneider Angulon f/6.8 90mm lens on a Linhof recessed board, the recess is 10mm only and there is no problems with access to the mechanicals. My lens has a Linhof Synchro Compur shutter. I would humbly suggest that this is realistically the shortest lens you can attach with the standard bellows and still move the front standard up or down, or the rear up or slide it sideways, rear or front swing is not really an option, but if you push enough, it could be done a bit.
The Shen Hao (my model) has the ability to remove the bellows in about 30 seconds flat, re-fitting takes about a minute, so that isn't an issue.
The camera is capable, and in my case does, hold very heavy lenses on the front at full extension, I have a Komuron 400T which is a huge piece of glass, it works well.
I looked around a real long time before I had decided to get the Shen Hao camera. Value for money and the range of possibilities with all of the different movements, made it a no brainer in the end.
I have a geared Calumet monorail camera, old decrepit and as heavy as a truck, the Shen Hao cannot match it in a studio situation, but it's a reasonable second.
In the field, the Shen Hao is brilliant. Whack it on a tripod, open it up, reverse my 150 Fujinon lens which stays on in the folded position, and you are away focusing in about 45 seconds if you are in a hurry, I know this because I have done it.
Geared movements are good, in fact sometimes they are a requirement, but realistically, you reach forward, loosen a knob with one hand, then slide the front up or down with the other hand, lock and you're away.
For your main chosen application, I can see how a rear focus arrangement would be better, especially if maintaining a set ratio on your film. Apart from a rear focus capability, the rear of the Shen Hao is brilliant. It slides left or right, swings left or right and goes up. There are very few cameras in this price bracket that can do anywhere near that, it is an impressive bang for you buck.
Mick.