Oval lock holder for locksport/lockpicking

Designed for making oval locks a bit more confortable to hold while picking them. This was intentionally made fairly snug, and requires a little sanding. I've had feedback suggesting that it may fit better on some locks by enlarging at print time by 0.1mm. There's a small ledge to prevent the lock sliding in too far. To remove locks, it's easy enough to use a bolt on a firm surface, and knock the lock out the front, from the hole in the back.