Yep that's the model. Uses 10mm belts.
My statement was, "use of a 1/2 inch wide replacement belt produces wildly high excessive
There exists a reason I chose those specific words. I measured the speed that resulted with a 1/2 inch belt and the pulleys configured for a blade speed of 80 feet per minute. Precisely, with a Jaquets Indicator. Then I double checked pulley setting and also the Jaquets against a known standard (a tractor PTO) and yeah it works just fine. Then I took a reading of the blade's speed again, and again.
I stand by my use of the words wildly excessive.
Average feet per minute speed of the blade with a 1/2 inch belt was about 1,100 fpm.
In the 6 seconds allotted the small wheel spins and passes the 300 inch mark not less than 7 times.