The 105/207 DID NOT SHRINK.
it penetrated the walls of the ferrule.
Wet mix do not shrink .
They shrink after they harden up .
And that experiment just proved the 105/207 is one of the best base coat . And 105 as A-joint epoxy .
If you know what you are doing.
Heaven forbid if some use 5-minute epoxy as base coat .
A 10 to 25% volumetric shrinkage is not from wicking in to Juma PJ.