I have such an ITM receiver on an M70AB2 (non flush safety lever) and the guy even said the trunion was ground. So back in the day when the first Century ones were coming out for 395.00 I gave it a go on his only when he sold it to me for under 300.00, I think it was 270 something. Its still shoots great today, some 10 years later. But the work was nothing like the OPs. This one looks like it infact would be a slab side with much better build.