Digressing here, but...
I think the Force can cope with Dunning's loss, if he heads to the Brumbies. Sort makes sense for the Brumbies, if they consider Dunning a LH only (which is taking away a lot of his value, I think).
The Force are getting in Ma'food, who will probably come close to being their starting TH. Plus they have Cowan at LH, and they've been pushing Longbottom, who has held up fine off the bench, by and large. The fourth propping position will probably be taken by PAE, by my guess. Despite being only about 19 or 20 (?) next year, he's a very big lad. Still too young to play prop in Super rugby, in my opinion, but I suspect the Force are happy enough with him as a fourth prop in this stage of his development.