Restarted the second shoulder plane while finishing the wood in the first one. Positioning the ramp isn’t fun as I cut the sides of the sole wider than the ramp (by 0.010”). But I have some 0.005” shim stock which I’ve used to center the ramp (held in place with blue tape). An inverted wedge allows me to clamp the whole mess together, which was a royal pain to get everything aligned in all planes. Now I can tack weld it with my TIG torch, followed by machining the ramp through the sole. No, there was no good reason for not thinning the sole.