I have found the steps given in the link below have resolved issues a few times now when I run into a disk that fails to mount in High Sierra. https://mycyberuniverse.com/web/how-fix-mediakit-reports-not-enough-space-on-device.html First time I ran into this issue, it was with a brand new WD Elements HD. I think I eventually found the correct information on Western Digital's website, (which is referenced in the link provided). I ran into this issue again this evening with an old APPLE (Maxtor) hard drive from an old eMac... Seriously Apple - fix your tools... one shouldn't have to find "obscure" terminal commands to do something that DiskUtil should be addressing, particularly if erasing or reformatting a drive... Note that this fix is one to try after other steps (restarting, single user mode disk check, etc.) if the drive has data on it that you need. In my case, I was not concerned with retaining any data from the disks involved.
I ended up getting these http://a.co/2mxO8Zz for my early 2015 Macbook Pro 13" Retina (an A1502 model). I removed the bottom panel and discovered the existing feet are "welded" in place (plastic stem on the foot being heated up and mashed down to sandwich the foot to bottom panel). Two of the feet are accessible, the other two are located underneath an insulating or sheilding material. Fortunately the foot I needed to replace was one of the accessible feet. Not sure if these would be the same for a 2013.