Congrats on the lil smoker and +1 on Machtech service too. If you still have the fender pan off, pull the tank, fuel cock/tank bung, give it a good flushing with water and soap and change the fuel lines also. That will eliminate a bunch of issues.
Got any pics of the starter mod? He should have used a hole saw.
DSC03334.jpg
Check the bearings in the cooling fan also. I've had a few that needed new bearings.
I order a bunch of these to keep on the shelf.
http://tewarehouse.com/7-07461
http://tewarehouse.com/FUEL-SHUT-OFF
And all the diesel goodies that are needed too.
Here are the filters you need.
I use Rotella T 15W-40 oil and Wix filters part #
Air - 46270
Pre fuel - 33972
Fuel - 33389
Oil - 51064
Hydro - 51410
Good luck, keep us posted and feed us lots of pics.