Looking on your project, it was soo impresive. What you've done adapted from closed mould system generaly applied by RTM (resin transfer moulding),  yes for a moment  it's look simple but when I look inside it turns "The devil is always on the detail". first in closed mould system the resin flow under pressure from RTM infuser, its look like a pump push inject the resin, second the mould flanges are sealed with some kind like a sillicon ruber as a containment sealer, to keep the resin stay on the moud. And third is vacum assist are necessary to help  sealed the mould and maintaining low pressure then resin could be easisly spread all the area and focus on vacum line catchpot point. fourth, many manufacture using close mould made the upper moulding with transparant form so they can monitoring the resin flow. Gloss both side on the part would be nice