From: Beijing, China
As I understand the manual, construction SUs attached to HQ automatically do rail repair, within the command range of that HQ.
Therefore, to complement the professional FBD units, does it make sense to stuff an empty corps HQ with a bunch of construction and labor battalions, lock it, and place it near the newly-finished railhead and use it as an "amateur" FBD?
The reason to use corps HQ is that it's command range is only 5, thus making it possible to focus on an area. When attached to army or armygroup hq (i suppose RHG command is army level), they will just choose locations as westwards as possible.
Will such a practice work?