Loading from CollDB doesn't allow the same keywords as creating the element directly

[JPTS2]

I want to create L shaped collimators
I think it is clearer specifying which Jaw is moving explicitly in this instance, but I can't parse the same expressions as xc.EverestCollimator takes when loading from CollDB

colldb.json

colldb_broken.json

N.B. Also cannot make "True" L shape as 90 degree difference is forbidden
Perhaps this is too strict? It is currently asserting the angle difference is >=90, could this just be changed to > as a start?

@freddieknets