I just bought a used core set along with Ally packs for Lando, Leia and R2/3PO.
I don't own any of the expansions and don't plan to purchase anytime soon since I haven't yet been thru a campaign or played any skirmishes.
I'd still like to use the Side / Skirmish Missions included with the Ally Packs, but looks like several of them require Tiles from the expansion sets I don't have.
Will any of the core set tiles work as proxies? Obviously degrades the aesthetics, but are any the right shape to sub? Couldn't find here on the forums or files, honestly was overwhelmed at how much content there is (a good thing) !