Tuning Custom FX Crown stock ideas

Guys, I wanted to make a custom stock for my FX Crown and I'm looking for some "enlightening" photos or some ideas on which line it should have. The stock will be built from a solid walnut board. In truth, I have already built one in walnut, but I have created, by copying the idea of ​​a user of the forum, an external plenum, to be placed under the barrel, so the stock I have built is no longer good. Hence the idea / need for a stock with the longer front. Ideas ???? Thanks in advance to those who will help me.