Pocket X-Y Level

Having found a difficulty in obtaining a really small pocket level for my boat making, I designed this holder to allow an x-y levelling device to be made from two very cheap rectangular keyring levels. This can be modified for cylindrical levels as required

The design holds two basic 15mm x 40mm levels. Please don't 'print for profit' & more items will come through as I find I need them in my shed. Any constructive comments welcome (please be kind with your words as this is my very first attempt at a design having got my printer only 3 weeks ago).

Adjusted for scaling error- now correct.