where did you have the box overhauled?

When you had the probes installed, we’re you able to work through the access plates or did you have to remove the upper wing panels on the 337?

Our A&P had to open up the wings (after supporting them) to replace two senders in each main tank, and remove the Flint tip tanks to replace the sender in those.

Tech Aire was the place that I had the unit overhauled