mark my maths took a left turn last night , and doubled the area you have secured your mirror on to
..adheasive wise what did you use to fix the velcro to the ply and glass .. contact ?.
Rob your welcome to use my router .. I'm done with all the ply and aluminium I'm going to cut with it for now .. It comes with a circle attatchment
which will do a 500 mm OD ring if thats enough for your plans .
Let me know when you need it and I'll get it to you.