Though I am fairly new to this forum I have been training the marital arts for many years. The fact that you said you were even considering 'throwing out' your previous knowlege pressed me to respond. My senseis have always told me 'there is no dominant art, the more you know the better'. I think this perfectly applies here, why throw out you previous knowledge when you can train that plus your new style (what ever it may be). I am sure you can apply some of the previous techneques to the new style.