[sdiy] Makin' OTAs

[anthony]

I have several selected 3046's from some scientific gear. I should try them 
in something like this.
I also have a bunch of mystery matched pairs from Tekronix gear.
Which brings me to my question:
What about using matched JFET's? Because the vast majority of matched pairs 
that I have just lying around are matched JFET's.
Wouldn't FET's be better in tempco apps too? Am I missing something obvious?