Hi, Neil.
I adapted the "Ah-Sup" sheeting method for use on my Wayfarer dinghy, which I unfortunately have used very little since building it.
How mine is configured is that the helm's sheet goes through a block on the transom and is tied off to a triple block.
A separate single continuous line runs from the sheetspans blocks on the leech run through this triple block to perform the same functions as would obtain on the mainsheet running to the transom on a larger boat.
Twist control and control of reefed battens.
In Ahsup's case, he seems to have simply tied away excess sheet at the leech of the sail at each batten as he reefed.
I went one step further and brought the line going through the triple block further forward along the bottom of the boom to a turning block at the mast and down to a jammer cleat on the Tabernacle.
So when I reef, at the mast, I drop the required number of battens and haul in and cleat this control line to bring the leech back to it's proper amount of twist and put the excess line in a bag.
So there are 2 sheets in action.
A single sheet ( the "active" sheet) with only one turning block from helm's hand to triple block. This controls the sheeting in or out of the whole sail.
This means friction is much reduced compared to the standard PJR layout with lines running through multiple blocks.
Important for maximum responsiveness in an unballasted dinghy when big gusts come. It seemed to work well.
The 2nd sheet ( the "passive" sheet) is only operated when reefing or increasing sail. Hauled in to provide the right twist and then cleated off. Or released to allow putting up more sail and then adjusted to give the proper twist to the leech.
Unfortunately, this system still leaves a lot of line in the water in the event of a capsize, ( lots of line just can't be avoided with the Junk rig) but I personally believe it does improve sheeting response in a gust which is important in a small dinghy.
So I suppose for a cruising dinghy, as for a cruising yacht, the importance of reefing early is the key to avoiding capsizes or broaches.
It's just made a bit easier in the dinghy with one sail and no need to be fiddling with tying in reef knots on a flailing boom. All reefing work can be done at the mast, which in an open dinghy leaves you sitting safely amidships.
My sail is a Split rig which pushes the leech further forward and creates more space aft for creating better sheeting angles per PJR.
Split rig is not that much extra work to make.
Alternatively, I believe some users of one-piece PJR style rigs have pushed the sail area forward of the mast to close to 30% and suffered no problems with lack of sail responsiveness in gusts. So that might help create more space aft for sheeting also.
Also sailmaking might be a little less time consuming.
So you need to decide which type of rig you might use, sort out the mast position with regards to CE and go from there.
If yours is a fully open boat, perhaps you might consider building some sort of longitudinal box with multiple positions to install the mast, so you could experiment. :-)
I just haven't had time to do more with mine, but if I get it up this year, I will take photos of sheeting arrangement and send on
Good luck with your project.
Dave D.