Decking Drill Jig

I've just replaced the decking planks on my wooden deck and I noticed that on the original deck some of the screws were not central to the cross beam and had split some of the framing cross pieces so I designed this jig to help make sure the screws were always in the middle and were placed in the same place on each plank.

This was made for planks 145mm wide NOT the narrower 125mm planks so be aware.

I printed it lying down along it's length but one of the legs split halfway through the job but it was still usable, consider printing it standing on end to give the legs more strength also check the width of your cross beams, mine were 47mm nominal.