What follows is a cautionary tale of hobby ideas gone awry, I tried to cast my own bases and I should have known better. The cost of the materials and time involved is a lot unless you are going to try and sell them, so take my advice and purchase them from one of the many online sources available. My little project documented in this update only served to raise my respect for guys that actually do mess with resin casting. For the rest of us, just buy it from them!
With the project of rebasing the entire force on the horizon (I cannot stand the standard bases I am using) I needed to decide between purchasing resin cast bases or creating my own, it goes without saying that I will be purchasing all my future bases! So I decided to experiment a bit on the sentinels. Here are the two base variations I tried: