question about tapering aluminum mast and forestay placement

[Southbound]

Greetings and thanks in advance for any assistance and opinons you may offer.

I am in the process of doing a DIY mast replacment and will with the help of very competent welders and engineers will be tapering a 56' mast section and chaning the mast head set up to be fractionally rigged.

When placing the weld in 7/8 rig attachment on the mast, what are the thoughts in placing it at or just above where the bottom of the taper starts? The original plan was to place it beneath the bottom of the taper like most masts I have seen. However that allows for only about a 3'6" taper.

Thanks,