Beauty is not the thing - functionality IS. And it looks like you achieve the aim - to get pressure on your curd.
I’ve had to modify mine as well. I had difficulty at higher pressures with the curd seeping under the mold and raising it up. I don’t use a cheesecloth on the final mold, and that’s why it happens. The reason for no cheesecloth is that I got tired of the curd being impregnated into the mesh of the cloth, which is really difficult to clean out. Anyway I’ve had to put stops on top of the mold to keep it in place.
Also, I’m wondering if you have any trouble with your mold “walking” to the side since your stop has no guide to hold it in the vertical?
One more suggestion: Put borders on three sides of your floor and you can place a bowl under the edge of the fourth side to collect the whey. This way your mold would not be resting in a pool of whey.
So, now the really important question: how are your cheeses turning out in the new press?