I did say..

* --I'd use a butler or colpits nominally.--*

In that last post.

I'm familiar with the Stephensen design, it's one of a family. Also
Ham Radio magazine of years gone by did several
articles surveying crystal oscilators, that topology Both the QST
Pierce and Stephansen Butler date back to the vacuum days.
I might add I've been around electronics that long too.

So you did. I have had troubles with the Butler many times when using both
tubes and bipolars. Stephensen explained to me why, and I've never built one
of his that didn't work as planned right out of the chute. PSpice may have
helped, but the bipolar/FET was a great advance. I don't quite go back to
spark, but am getting pretty long in the tooth as well.

Regards

W4ZCB