Dance A Little (Impromptu) Jig

I found a need for a spline jig.  Normally I check my print sources and the 'Net for examples or advice on whatever I'm doing.  Tonight I was too impatient to wait and threw together a spline jig, or what I think a spline jig should be.

I guess it is more correct to say my son was too impatient.  I have a shop assistant for a while due to shoulder surgery.  We are working on a back lit box to display his vintage movie posters (and a project for the blog once I get my arm back).

Here is our creation:

The two halves are mirror images of each other.  I put the hole in so I could see what was happening.  The first test proved my thinking wrong.  I can't see a darn thing except the frame in there.

The splines are going into large shadowbox  frames.  I made the support boards tall enough to get a good clamp hold on the frames when in the jig.

The jig will live long enough for the current couple of projects, but something more durable will have to be made for the future I think.

Links to more useful spline jigs are certainly welcome below.  Typing is still a strain, so it is off to the couch for an ice pack.