I was only aware of them having the 3 and the 20. So you like the 20, it works well for you? Which version of the 20 do you have? I have considered getting one, they make it sound so easy to hatch eggs in them.
the R-Com 3 egg model has an insert that allows for up to 7 eggs- it is 16.00 give or take with the 3 egg model - as long as you want to hand turn it works-- the insert doen't fit correctly into the machine so the eggs do not turn -
One of the Reasons we all upgraded and returned our R-Coms last year
I have a r-com 20 they are nice and they will fit 20 eggs if you buy the chicken egg tray. If you only use the universal tray you won't get that many in it. I don't like the universal egg tray because it makes the eggs rub together as they turn. I paid the extra $25 and bought the chicken tray and love it.