Well Aggeman "sits at the right hand of Marneus". So you could make him a Master rules-wise. But to collect the Chapter would also include the ENTIRE Armoury wouldn't it? Including Techmarines. Librarians stay in the Librarium, and get selected which one goes where by Tigurius. Only Chaplains stay in Companies.Are you including Headquarters Staff? 'Cos then that includes Chapter Master, the 3 Honour Guard squads, then more Chaplains including Cassius. Not only this but there is also the Transport vehicles and the fact that to buy all, make and paint all of this WILL take years. Literally.