(newbie question)
As a hobby, I'm doing small projects with plywood, usually not much bigger than a bread box. Previously, I used both wood screws and glue at the same time to assemble the parts (drill holes for the screws, paint the edges with glue, then assemble them with wood screws as usual), with excellent results - solid construction that withstands a lot of damage. I never used dowels, dados, or anything like that, just straight square edges.
The problem was, I could never align the pieces down to the last mm, the parts were usually off by 1 or 2mm because I could never drill the screws in with enough precision. Another problem, because I would usually use epoxy resin for gluing the parts, I had to work pretty quickly before the resin would solidify, and that had a tendency to create problems.
I'm making a square box now, around 10" each edge, using 1/2" baltic birch ply. This one needs to be very precise and very square (it will be the cradle for a telescope tube), so I'm not using screws to assemble it. I just glued the edges together with West System 105 epoxy resin, and then clamped it down. So far so good, all the pieces are aligned very well, and it's perfectly square. Looks great. In a few hours the epoxy will cure to solid.
My questions is: after the epoxy has cured, should I drill some wood screws, let's say 2 for each edge? Would that provide additional bonding strength? My goal is to make this cradle as strong as possible, given the material I'm using.
More general question: When assembling pieces with straight edges at 90 degrees, do I actually get any additional strength if I use both glue and wood screws, as opposed to using either just glue or just screws?