It prompted me to finish the conversions for a full army and then play the worst game of 40k I had played until then and since. I fielded my fully painted and 95% converted army against a unpainted optimized tournament army. By games end, my army was wiped out to the last model. While in return, I had managed to stun my opponents dreadnought and that was it. I didn't kill a single model and was wiped out. Back to the drawing board and the conversion table. I sacrificed a chunk of my Catachan army to reengineer them into the Admech force adding more special and heavy weapons. I added more tanks and still lost more than I won but was able to at least give my opponents a run for their money.
Then came the newest Imperial Guard codex and the latest growth of my Admech army. I love the new Guard codex. It has finally given guard players the tools to make other players fear playing a guard army instead of of thinking "easy win" when they see Guard across the table.
Enough history, here is a tutorial on how I build my Adeptus Mechanicus Guardsmen.
First I start by assembling a basic Catachan legs and torso. I then round up a plastic gift card and break out my standard paper hole punch. I then punch out as many discs as I need for the current project. Then I glue one disc to each left arm on the torso. This will be the base of the weapon arm.