The tank for today is a Russian light tank: the T-26.
Much like the BT-2, this tank actually has weaker armour than the MS-1. However, unlike the BT-2, this tank does not compensate by being very fast. I found this tank absolutely dreadful to play, but I stuck with it long enough to elite it without using free experience. It's weak armour and low speed means you are a sitting duck for multiple tanks, and as your hull armour is identical on every side, the vehicles incredible traverse speed (which can be further increased with the unlocklable treads) is mostly wasted, as there is almost no reason to rotate your front around to face enemies. The frontal turret armour also drops to 15 if you mount the second turret. This does, however, increase the trurret traverse up to 46, which is very high, and also slightly augment the view range. As no one is going to aim at your turret anyway, it is a worthwhile upgrade.
In terms of speed and acceleration, even with the top engine I seem to remember this thing being dreadfully slow, despite it having a top speed of 36 kmph. Maybe it felt slower than it actually was, seeing as the tank is so small, but I'm not going to be purchasing it again to find out.
In terms of available weapons, it has quite a choice. It's stock gun is adequate enough for fighting tier one and two tanks, but may have a tough time penetrating some of the tanks found at tier three. One of it's available upgrades is the 23mm VJa, a flak cannon. Despite my love for the 2cm L/112 on the Panzer II, I would not recommend the 23mm VJa over any of the other guns on offer for this tank, purely because it does not have the maneuverability to be a hit-and-run style attacker.
The two contenders for gun of choice on this tank are the 45mm 20K, or the 37mm ZiS-19. Both guns have the same aiming time, however, the 45mm gun is slightly howitzer style: higher damage, lower penetration, much lower accuracy than the ZiS-19. Because of my preference for consistency, I would probably use the ZiS-19 on this tank. Coupled with the tanks low maneuverability, you are unlikely to be near the front line, and thus the extra accuracy will be very useful. On the other hand though, the tank does not have a particularly high view range, so the 45mm 20K may still be an acceptable choice.
In order to play this tank effectively, it sounds as though you basically need to play it like a turreted TD of sorts. You are not fast enough to zip around the battlefield, offering support where needed, and you are not heavily armoured enough to be involved in a frontal push towards the enemies lines. As such, you should remain further back, using your accuracy to help dent or pick off unsuspecting targets. Unless you're using the 45mm, in which case you should be slowly trundling forwards, preferably using something with more armour than you for cover, and trying to derp people with your mini-howitzer.
To combat this tank, just shoot it literally anywhere and it will disintegrate.
Fun: 1 ZURA. - I don't remember this tank very well, except that it was slow, died easily and didn't hurt things very much.
Exp: 0.25 ZURAs. - I have an average exp in this thing of 88. For reference, I have an average exp of 173 in the MS-1.
Money: 1 ZURA. - It's a tier two but based on my inability to gain any worthwhile exp in it, I very much doubt it was particularly profitable.
Scary: 1 ZURA. - Shoot the T-26 until it dies.