I have a soft spot for lean, mean A13s, so I have a few of those in 15mm, but the poor old A9 and A10 are related to my 6mm ‘junk’ regiment which I use for early war desert battles.
I wouldn’t be too sniffy about these lightly armoured tanks, interwar light and medium tanks were commonly only Armoured against machine guns, even the early models of the Pz III and IV. The idea of ‘shell proof’ medium tanks was more of a late 1930s and early 1940s thing. The British cruisers did mount one of the most effective anti tank guns of the era.
"Mistakes in the initial deployment cannot be rectified" - Helmuth von Moltke