Hi Tadakatsu. Technically this is really well done ... not much to complain about.
From a personal point of view, this model lacks life. The base yellow is very monotone, offering no depth to the details. Some light "fading" or dry brushng would give this a huge lift. I like the foilage, but theres a lot and the only thing that breaks the colours and adding contrast. A tank in combat would have some other signs of life, personal stowage, etc. The tow rope is very poor detail-wise.
Sorry for sounding negative ... just trying to offer an opinion and some constructive critism. You have definately talent. The camo shows this. Take it a step further, and you´ll have an awesome model.
Scale doesn´t matter ... choose the one that suits you. Its the finished model that counts. Look what Sven-Åke does in 1/72.