Russian tank T-90

As a basis the model by Sergey Syuvaev that ranked the second in MASTER 3D contest, Topki, Kemerovskaya region, "Assemblable tank model T-90 at a scale of 1 in 16" project was taken. ( https://vmasshtabe.ru/konkursyi/kompas-master-3d/masshtabnaya-model-tanka-t-90.html ). It was improved and adapted for 3d printer.
Tank assembling and test drive https://youtu.be/TTvJP5NjGdU description https://youtu.be/4k3HNdOr-ZE
Attention: some parts of the model should be manually adjusted!
All rollers are springed and jockey rollers run properly. Each (12) roller has two bearings 5134 mm (695ZZ ABEC-5), each top roller (6) has two bearings 3x6x2,5 mm (-2RS), each support beam(balancer) has two bearings 4x9x4mm (685ZZ ABEC-5), each drive roller (2) has two bearings 5134 mm(695ZZ ABEC-5), each jockey roller (2) has two bearings 5134 mm(695ZZ ABEC-5).
I used springs of old umbrella for each support beam. Any other can be used if they have proper tension.
Attention: all rollers are preferably to be printed putting them down so printer threads go along the roller thus its torsional strength will be much higher.
The control panel HENGLONG (1:16 RC tank spare parts No. 2.4G transmitter / controller / receiver / lines-5.2 version) is used to control the tank. There are other HENGLONG units used in tank:

• smoke supply unit
• ball firing unit
• steering system
• power unit
• gun angle alreation unit

Update 1: Added new version (1.1) and Assembly guide
Update 2 (04/12/2020): Added new version Assembly guide(1.1)