This may be a long post, so be warned

1. Balance for light tanks is a little off. The L6/40, Panzer 35(t), T-26, and 7TP should ALL be buffed to 44

. My reasoning is as follows:
I.For the L6/40, the following is from "The Encyclopedia of Tanks and Armored Fighting Vehicles" (pg295)
This tank (the L6/40) was produced in significant numbers and saw service on the Russian front. It was considered to be roughly equal to the German Pzkpfw II...
II.For the T-26, as much as I hate Wikipedia, here I must quote it:
T-26s were used in almost all military operations of the Spanish Civil War in 1936–1939 against Nationalists and demonstrated there a superiority over the German Panzer I light tanks and Italian CV-33 tankettes armed only with machine guns...The T-26 light tank was inferior to the German Panzer III and Panzer IV medium tanks in gun calibre, speed, manoeuvrability, armour but the T-26's armament was superior in comparison with the Panzer I, Panzer II, Panzer 35(t)
(Address is here:
http://en.wikipedia.org/wiki/Combat_history_of_the_T-26)
III.For the Panzer 35(t), I'm quoting a website called "achtungpanzer.com" (Link is here:
http://www.achtungpanzer.com/panzerkampfwagen-35t.htm)
LT-35 was comparable to other European tanks in service at the time, such as: Polish 7TP, British Vickers 6 ton, Soviet T-26, Italian Carro Armato M 11/39 and M13/40 and German PzKpfw III tanks.
IV.For the 7TP, I again quote "The Encyclopedia of Tanks and Armored Fighting Vehicles" (pg353)
The 7TP proved a match for German panzers in September 1939...
2. Italy's starting tank strength is way off. Again quoting the trusty "The Encyclopedia of Tanks and Armored Fighting Vehicles" (pg280)
By 1940 the Italians had built 1320 tankettes, 27 light tanks, and 100 medium tanks
In this quote, medium tanks mean M11/39s, light tanks mean L6/40s, and tankettes mean L3/33s, L3/35s, and Fiat 3000s. So what does this mean?
I. Italy, when the 1939 scenario starts, should have an M11/39. And that's it, for normal tanks, at least.
II. The tankettes need to get in the game ASAP. Because they WERE important, if ineffective.
3. The Polish 10TP is currently a medium tank. It should be a cruiser tank. Quoting "The Encyclopedia of Tanks and Armored Fighting Vehicles" (pg354) again:
This... tank drew heavily on the Christie... design.
And again:
The 10TP was... derived from the influential Christie design
4. As kind of a side note, the Panzer 38(t) needs to get added. My reasoning, "The Encyclopedia of Tanks and Armored Fighting Vehicles" (pg346)
The Panzer 38(t)... at one point... made up 25% of the German tank force
I tend to think one quarter of the Panzer arm was fairly important.
I. Also, when the Panzer 38(t) gets in the game, it should be around 56

.
My source is the same as the above
...the Panzer 38(t) proved effective in combat against the same-generation medium tanks of the French and Balkan armies
By "same generation French medium tanks", it means the Souma S35, which is currently 56

.