OpenLock Derivitives

01/23/17 Updated Bases with OpenLock Standard Keyholes 6mm Plain Bases for your pattern design. Added XI Full size, XIA half size of a full XI, and added a reason for XIA, a buttressed wall. Also added XI Theory (slots on both sides, probably redundant/superfluous) Thanks for looking.

Projecting a further discussion on OpenLock tile options. Currently the standard options on curves are the F, with G and H walls/half floors and the V, with X walls/half floors. A W fills out the V to a 4x4 squa