Hi.
The steels (Pirastro somethings

) are killing me. Not playabilitywise, but the sound isn't quite what I'd like.
I'm not quite comfortable with the idea of dropping all that cash for the guts at this point either.
The trimmer line "weedwhackers" seemed a good idea, and as they're not widely available over here as a DB set, I hit the gardening stores.
The 3mm is the thickest round section line I can find on the shelve??? As anyone who has tried them, knows that 3mm nylon makes a decent D and a floppy A, something I had to discover myself. Silly me not researching enough about the thicknesses beforehand

.
When I bought a couple of timing belts for my KTM GS600, I got Optibelt catalog from the sales guy. Optibelt has
polyurethane round section belts in different shore A hardnesses: 82, 85, 88, 92 & 98. The thicknesses start from 2mm for the standard RR and are in 1mm increments. Unfortunately the RR Plus with the tension cord starts from 6mm.
I couldn't find the tensile strenght and elongation figures for the Optibelt products, but if my memory serves me correctly, the round belts I have seen in use have been under quite a force. Obviously I haven't got a clue whether those belts have been reinforced or not and I haven't been able to "tune and play" the belts either

.
The round belts aren't too expensive, about 3-6€/m, but they aren't exactly cheap either. The minimum order lenght of 30m somewhat pumps the total price up also, so if any of You have tried round polyurethane belts as a string material or in the industry applications, any experiences would be highly appreciated.
Regards
Sam