Cat D3, Deere 110 TLB, Kubota BX23 and L3800 and RTV900 with restored 1948 Deere M, 1949 Farmall Cub, 1953 Ford Jubliee and 1957 Ford 740 Row Crop, Craftsman Mower, Deere 350C Dozer 50 assorted vehicles from 1905 to 2006
I have not seen it myself but a spool lasts a couple of months here and stored in a cool walk to daylight basement… might help on older stock?
My favorite head the Tanaka Brain never needed bumping and was auto feed…
As the string got shorter the speed increased and the higher speed overcame the feed latch to feed new line…