Also a quick update on how the house rules are affecting the game!
As you will see, I have gone to town on Salonika and the Dardanelles. The jury is still out on whether this is a good move or not. Usually in single-player I'd just hammer the Germans and Austrians, until the Austrians surrender. However, with the Western Front crippled by giving Germany a tech advantage, and the Eastern Front crippled by having the AI play as Russia with a disadvantage against the Central Powers AI, that doesn't really work. So investing time in taking down the Ottomans is probably well spent. But I think that I'd probably have had more payoff by investing more effort in Egypt and possibly Mesopotamia.
In terms of research 'chits', at the start of the turn the position is as follows.
Britain: 8 earned, 2 as yet unspent, 6 spent on: Infantry Weapons, Infantry Warfare, Trench Warfare x 3, building Smith-Dorrien HQ
France: 9 earned, 2 as yet unspent, 7 spent on: Infantry Weapons x2, Infantry Warfare, Trench Warfare x 3, Gas and Shell Production
USA: 3 earned, none spent.
note that parts of that research hasn't completed yet!
This has, as intended, resulted in me diverting my spend away from some 'obvious' techs and towards some less obvious ones, while also creating a tech advantage for Germany. Which in turn has meant there's been more reason to focus on areas that aren't the Western Front. Good fun!