Oh wow. 100mb each is very high for a non-curated, ready-to-use skinpack.
You know, I was just looking at the German 1944 - Macular skin and wondering how he got 2 armies in only 47MB.
Then I realised: I used a lot of wear and tear layers on my skin packs, which would have shot the compression ratios to hell. What was only two colours suddenly becomes a huge variety of shades that are nowhere near as easy to compress, so the smallest I could get was 70MB for one army.