Does anyone have experience with gluing down hardwood treads onto a 3-stringer stair? Tread width is 40-inches. I would like to eliminate the stain and varnish step, by having the treads prefinished prior to delivery at jobsite. To minimize unsightly screw holes or nails holes, it would be easier IF there is a viable glue-down method for such hardwood treads. Has anyone ever done this? If so, what were the results?