Mike, haven't you missed Drew's question which was will the 1617 collet go through the centre of 1 19/64 ID template guide.
This question raises two important points, the simplicity of METRIC and the reason that where possible I use a 40mm template guide which allows the collet of EVERY router on the international market to fit through, enabling a much deeper cut plus of course the ability to actually SEE what the bit is doing. 1 19/64"..............really!
Nothing but heaven itself is better than a friend who is really a friend. - Plautus