Hello, Scott,
I have a 2018 R-31S, and a Portland Pudgy. With the right combination of hardware, the R-31S and Portland Pudgy work very well together. I use WEAVER MARINE PRODUCT'S PORTLAND PUDGY DAVITS. On my davits, the Portland Pudgy is high enough not to get anywhere close to dragging in the water. While the Portland Pudgy is lowered, it will lay flat on the water while still attached by the davits. With stand-off brackets, the dinghy stands straight up on it's side, stays off of the rail, and is not too high as to interfere with your rear view vision. I find no aerodynamic issue having the Portland Pudgy onboard. I use a TORQEEDO 1003 LONGSHAFT on my Portland Pudgy, with the TORQEEDO 915 WH BATTERY, and it all works very nicely.
* I order my Portland Pudgy with the LIFTING EYES, to connect my stand-offs to from the transom of my R-31S.
* From Weaver I ordered the PORTLAND PUDGY DAVITS, which include the peices that attach to the Portland Pudgy though it's lifting holes. You will need to specify PORT SIDE MOUNT or STARBOARD SIDE MOUNT.
* From Weaver I ordered the 2" UP / 4" OUT UP-SET HEADS, PART #100-UPSET (with the davit heads that are extended out to 4 inches longer).
* From Weaver I ordered the QUICK KIT for easy slide removal of davit heads from swim step.
* From Weaver I ordered two 48"/54" ADJUSTABLE STAND-OFF BRACKETS W/CBE (CLIPPED ENDS), PART #330-SOA48/54CBE.
* I have a hardtop over my R-31S's cockpit. I attached a WEAVER WINCH to the very rear underside of the hardtop, along with the QUICK KIT for easy slide removal of the winch. This makes winching up the Portland Pudgy very easy.
I hope this info helps you in any way. If you'd like photos, please PM me your email address and I'll send them to you.
Greg