We have an 800mm quadrant shower tray that we'll be installing. I wanted to ask if it's possible to make the useable area of the shower slightly bigger by offsetting a piece of timber on the bits of the tray that will go against the wall, and pieces of timber upwards for the shower door fixings. I probably haven't explained this very well, but imagine a shower tray about 100mm away from the wall, with the gaps covered by wood (with tiles).