HELLO,i've used the stopclock timer on the G70 enlarger for many years without any problems what so ever.this was the model without the build in timer on the front.this was one of the best enlargers i've used,only used for b/w printing.i only change it when i bought a de vere 203 fitted with the ilford 500 head model.i couldn't get used to the control pad with the 500 head at all,then i bought the RH design dedicated timer for the Ilford 500 head,back to heaven again!!.can't recommend it enough,takes time to get use to but then this is only natural for any new tool.
hwyl am y tro.
(no conection what so ever with RH only a happy customer!!)