Hoss,

Just some information for you to add to the pile for the G0704. I killed the motor controller on my BF20 as you may have seen and have currently started working on replacing it with the 1.1kw BLDC set up from Keling. The motor has a 14mm shaft on it and while researching gearing options, as I'm not ready to go belt drive just yet, I found that Grizzly has updated the G0704 with a motor that also has a 14mm output shaft. They list new gearing parts for it as v2 parts. The stock 20 tooth gear can be had with part number P0704230V2 and the key can be had with part number P0704231V2.

I'll confirm after I receive it that the parts are correct and work with this set up. If that fails I'll probably do the 36 tooth conversion you did at one point until I am ready to go belt drive.