Hi,
I just received my order of belts from turntableneedles.com
The wm-10 series belt (suposedly 0.7 x 147mm, 0.028 x 5.2in) fits tightly in the wm-10 & wm-w800 and applies quite a pressure to the reversing gear, which tilts & makes scratching noises (fix described by Mertol for the plastic holder of reversing gear needed?)
The wm-100 series belt (1.0 x 203mm, 0.039 x 8.0in) length seems correct, but is much thicker than the original and does not run (belt sections are in contact where they pass around the plastic pulley).
Those belts seem to be not quite as advertised.
Anyone else ordered the belts there?
Seems I need the original belts for the wm-10. In EU I found them for ~$20 in Germany and UK, which is steep compared to $3 Sony services price in US...
The wm-100 belts are NLA; what is the correct dimension?
Pic shows the new belt next to the original one on wm-f101. The new belt rubs where it goes around right capstan pulley.

Any advice will be appreciated. Thanks.

Talk to boardmember DocP, he is the undisputed authority on the WM-10 series, he will also supply you with the correct beltage.

Thank you agent, have already pm-ed him