well I've built out of marshalltown, built everything from pair of 48" A11's for bthe space shuttle program to 52" A11 class150 to 36" class 900, 12"-24"V260's ,built a lot of the 24"250's from Canada to Louisiana, last 2yrs built nuclear and white room assemblies. Was in on the first PSV's and suh for the AP's. very familiar with Valvelink and various stupid positioners. Worked with fisher actuators as well as Bettis,Elomatic,and limitorque.As far as welding i welded a lot of CVX units and most are F91. Was certified through fisher welding WCC to F91 and everything in between. Was qualified PED and yes i have welded nuclear parts to .