The hairdryer is used to blow air across the grain that is suspended on two screens. The one I found on e-bay had 3 temperature settings which gives me some control. I can also close down or open the vent holes on the bottom of the dryer with masking tape. The dryer doesn't get quite as hot...
I just finished making my first beer with homemalted grains. I did 10gals of a hoppy honey rye with about 12lbs of homemalted pale malt and 1.5lbs of homemade 60L crystal malt. I had to buy several other specialty grains including the rye malt. Overall, it went smoothly and is happily...