I've got enough saws for cutting wood, but I do like to tune engines. The stratos are definitely the best for picking up some power with the extra time/area on the intake. However, most are basically piston-port designs.
The Dolmar/Makita 6100 is a very interesting variation on the stratos, it has a reed valve in the strato section. The reeds can begin to operate as soon as the transfers close and a low pressure begins in the crankcase. This could allow the engine to breathe all the way through the stroke from transfer closing to the opening of the intake port (about 80 degrees BTDC). - Which is a period of piston movement that is 'dead time' on a piston-port engine where not only does mixture not flow, but a low pressure in the crankcase tends to slow down the piston movement.
The 6100 design isn't as effective as a rotary valve engine for intake flow, but it does have potential. I expect that reed inertia may limit the flow at higher RPM, so a thinner reed may extend the powerband. I've played around with reed cages before and I think I could re-work the reeds and cage to bump up the flow.
I don't know what it would take to maximize the reed flow, but it interests me enough to do research on different reed thicknesses from Polini and Malossi to get an idea what I could try.
Couple the reeds on the strato with an oversized conventional carb that I can mod to my specifications and I think it could bump up the power. Throw on a lightweight NK bar on the K095 mount to lighten it up and it could be a fun saw to use.
At this point, the 6100 is the only saw I would put on my 'bucket list' to add to my stable.