I would attempt a do it yourself Dutchmen "fabrication". I know Marty and had had 3 Dutchmen, on my 3 mains over the years. The system works great for me and has gotten better in each version.
I was also cruising in the Canary Islands when Marten visited and instructed a salimaker there how to do a proper layout, which seems to be the tricky part. He invited me to watch/help. It obviously required a sail loft to lay the sail out in.
A key factor is the relationship between the grommet location and the sail slug location. The spacing of the grommets will determine the size of the flakes and they should be basically in line with alternating slugs. You of course need to determine whether you will have two or 3 control lines and their placement fore and aft, plus the roach.
I believe Martin has a guide for sailmakers with instructions to do the layout. After that, it is a matter of properly installing the grommets and attaching the control line to a adjustable clamping system on the foot of the sail.
One thing aboutthe system. when it is set up and used properly is works very well. This means (for my rig) that I have the control lines taut when raising, lowering or reefing and slack when sailing. This is accomplished by changing the tension on the topping lift
. There are several way points of the control lines to the topping lift
are fair so the sail moves up or down with no friction (grommets must align with each other and their attachment point on the topping lift. for this to work).
I don't suspect the system has any measurable downside impact of sailing performance, but it does feel weird
drilling holes in your sail. (grommets should be reinforced).
The system is great for single
handed sailing. You will have to modify your sail cover
a bit, but this is only a few zippers aligning with the control lines.