Had the Grand Old Duke of York been a wargamer, he would not only have marched his men to the top of a hill before marching them down again, but he would have also paused at the top, and re-based them before making the futile descent, and then no doubt re-based them again (possibly back to their previous basing arrangement) before making them plod back up the incline, ad infinitum.
When it comes to basing, one of the joys of this Classic Collection project is that such decisions don't have to be made. That is, with the exception of the Pils Holstein regiment who originally were in their unbased form, then got based (twice if I remember correctly) in order to function alongside other armies, but have recently returned to their raw state so as join the other Stadden infantry in this army.
The Grenadier company has always remained unbased, and performed magnificently at Spurlash Down as an independent company. They have now been joined by the other companies, to form a 4-company regiment (Grenadier company, 2 Line companies, Light Company) following the Charge "mixed regiment" organisation structure.