I think any partnership should be 50/50 both money invested, time expended, and earnings. Anything else is foolish and dooms the partnership to divorce. Each partner has his own pluses and minuses, and brings his own contacts and experiences.

If you REALLY feel the need to adjust for “his idea and legwork” do it via him putting in slightly less money than you, but keeping partnership equal after that. But I think it is putting you on a bad start. One partner always does more than the other, or thinks he does. Just like marriage.