How to pronounce “heft”(noun) in English

So it really is kind of actually making whatever intellectual heft you have, you're kind of losing some of it.

For instance, you can have the most amazing heft, but if you can't be compelling in how you talk about it,

I couldn't get over the heft of my body.

warm, like a squashed penny from a machine on Fisherman’s Wharf, but it was cool and had the seamless texture of a plastic margarine tub and the heft of a paperweight.