Decathlon Bag Adapter for Brompton

Today the only little bag for Brompton is the expensive Ortlieb bag.
The cheap Decathlon bag b'Twin can attach to handlebar bike with its support. For install this bag on the Brompton bike I designed this thing that printed ABS work very well.
I coated the object with a layer of epoxy resin like XTC-3D.
The two holes can hold two 3 mm steel bars for greater resistance (reinforced plastic).