El Grande RollerBall Refill

[DocStram]

What gel or rollerball refills, other than Hauser, will work in the El Grade Rollerball?
(No need to remind me that this info is in the files somewhere, I looked and looked and then developed "information overload" and gave up.
Thanks for your help!

 

[Geo in Winnipeg]

A Schmidt 888 for sure (the same refill as Jr. Gent) and I think a Pilot G2.

 

[DocStram]

Thanks, George. I wonder if anybody else has suggestions?