I'm assuming that the triangle section is the toe of the bat?
You could use a drawknife/ Travisher/ round bottom plane ( moulding plane) to re-shape.
Where are you based? I'd drop im to your local pod shaver or forum sponsor to finish it off. It'll be cheaper and guarantee the shape and check the balance.
In the US. And doing it myself is part of the fun mate
Yes, the triangle is towards the toe, but the toe area itself is flat (like in the Clarke bat design), so the spine is NOT extended all the way down. I got this far using a drawknife.