I recently found a really nice Craftsman at a swap meet for $10. Never owned one all these years with the Bird, I am no mechanic but I just set the timing by where the thing runs the best and where it will restart easily when hot. LOL
I usually eyeball it too, with decent results.
My problem is I just put a rebuilt carb on, so between the idle mixtures needing to be set and the timing, I'm getting some really viscous backfires ,,, And I'd like to at least get the timing textbook correct, which would leave me with getting the right mixture from the carb.