u/Galakanokis44

New to Sylvaneth and very new to AoS. I recently got the spearhead with the spite lancers. It has clear bases and flight stand but does the base size matter much? Im looking to replace it with a 50mm base for magnetization. I dont know about the rules for AoS or if its base to base rules apply for flyers? Thanks for any information before I put bases on these flyers.