If you know what you are doing, you can change the script to get reforms before. I do not, but some do and you should be able to do a search and find roughly how. It can definately be done.
However... why? I have taken most of Europe with Sweboz, from the Pyrenees and Sicily to Nordkap, from Gawjam-Bastarnoz and Gintatas-Ostan to Tearaght Island, with no reforms until long after the required time despite all builds being right. Only reformed units I had until the last 20- 25 years were those I bribed from Rebels.
You already have badass units with high morale. You can pwn anyone.
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