Just when I thought I'd sorted it!I would, in all seriousness, put a 45° Rodding access on the end of the 100mm. It can be covered over with flooring, but will be there should it ever be needed. https://www.screwfix.com/p/floplast-push-fit-plain-end-45-square-rodding-point-spigot-110mm/87511?kpid=87511&cm_mmc=Google-_-Datafeed-_-Heating and Plumbing?kpid=KINASEKPID&cm_mmc=Google-_-TOKEN1-_-TOKEN2&gclid=CjwKCAjwp8OpBhAFEiwAG7NaEiKE7-SaLV8F62RK_tmrA4o0UfJXgawJCtxzj-Se6qwLxjZSjHnDPxoCblgQAvD_BwE&gclsrc=aw.ds
I'm going for glue down karndean style flooring. Just wondering how that would work/look.