I finally got around to making a good test run and video of this H74 Holt twin cylinder version of the famous H75 Holt Caterpillar engine ca 1910 ish. Jin made the H74 before producing the previously announced 4 cylinder version.
In addition, for 10% off, I can now offer my own discount code: RedRyder
which you all my use for purchase of any item offered by Stirlingkit.com
Here is a video for your viewing enjoyment.
Gil