im upto roast 5 or so now, each with 300g, which is about perfect for my weekly consumption. I picked up a 2 heat ryobi HG at bunnings for $40, which is going ok, except for like what MattG mentions the cooling off periods. i have got around them slightly by cooling it with the hairdryer if needed (which i use to cool the beans after roasting).
Ive had one OH&S issue so far while emptying the basket, when i put my leg up against the tip of the HG i had put to the side! of course before you realise with something so hot.... its TOO late, so i now have a decent blister on my calf muscle. ouch.
Im getting really good even roasts, even a few pre roast blends have turned out well.
One last thing is that i need to get some better oven mitts/gloves, because i roast outside my unit block which has an access driveway down the side... ive had a few embarassing moments when caught with the floral mitts..!!!!