Improvising a bridge clamp

I continue to rush the small guitar towards a level resemblant to completion. Rush is, of course, hardly the word that would come to anyone's mind. But between other obligations and projects (you can see our wood fired pizza oven to the left of Li's head!), I do my best. 

Today the bridge went on. But I had no clamp with a deep enough reach. So I made a c-shaped piece of plywood, three wedges and another straight piece. 

In the first pic you see them around the guitar, in the second you see the whole assembly. It's not perfect but the concept could be worth developing.