Tuning any tuners in oceanside/sandiego/escondido?

Motorhead is in Placerville between Reno and Sacramento.

Oh thats up north of you...like driving to Vegas twice. Well 4x considering round trip... Well 8x actually...

Your slow leak is probably the manometer. I would degass (you can shoot it till empty) then put Teflon tape on the threads. They normally come tuned pretty good straight out of the box.

The air pressure gauge.

Probably no need to but sure wouldn't hurt since the tank will be empty anyway. Dont get Teflon tape near the inlet holes. Watch this video on how to properly wrap Teflon tape on threads...DONT USE LOCKTITE...

https://youtu.be/KAW_PIrKw10

If the suggested gauge fix dont work then get an o-ring kit. Check/replace the valve o-ring and also the fill nipple. those are common locations with Prods/Mrods. If you use a hand pump with no moisture trap then im going to guess its the valve o-ring. 

go to Hobby Town / Discount Hobbies 2085 Montiel rd, next to Turners in Escondido, off the 78 hwy and Nordahl, across from the Walmart shopping center, or if you are near Vista, Go to Remote Control Hobbies 1580 south Melrose in Vista, near Buena Vista High School, they have Silicone shock oil for R/C cars, it doesn't matter what weight, 50 weight will do, use that for lubing the O-rings and other parts in the High Pressure side of the gun, other parts outside of the High pressure side you can use regular gun oil.