This is the mk3 version with a few changes following testing.
A quick and simple print that can be used to hold a playing card as a target. The holes are set out in a way to accommodate both .177 and .22 shooters. Following testing a sing M4 bolt was found to be enough to hold the card in place (in previous versions). This however now adds two outer holes to allow more secure fixing where required or for extra stability (when using .22 for instance. Holes are to be threaded in using the bolts(use a small amount of silicone oil for the first time to help cut in the threads). These can then me mounted on a board or as needed
The insert in this version can be used to go between the card and the bolts. This should again help to secure it but also stop any bending of the cards when using a single bolt.