I dont roast in a Genecafe however i use a Corretto (bread maker). I will ask though, after roasting the beans do you place them in a air tight bag? Like the bags you can buy of of here in beanbay with the one way valve.
I roast mine cool them down and have one fo these bags ready and throw them in. I can go back about 20 mins later and have a quick smell and normally they smell fantastic.
I have never roasted Uganda Bududa AA, so i cant dcomment on if they have a particular smell to them or not. Im sure someone with more experience will have some vauable advice.
Good luck with it all and keep roasting :)