what i do with contact- old trick from saddle building. i use clear (clean!!!)heavy builders plastic, and divide the area i want to glue in half, cover each area with a piece of the plastic.lay the part to be glued down on top of the plastic.
you can see through the plastic, to get things lined up perfectly- pull the one piece of plastic a way a bit, and contact that exposed area in the middle, if everything is good, hold the other half down with the plastic in between, pull the other piece of plastic out and contact that half of the product completely. once it is secure- pull out the other plastic, and contact that area.
make sense??!!
sounds a bit garbled to me!!