Amateur Icon Design for MilTRAC Project

I have decided to design some icons for my current project in Milsoft. It is a MRO (Maintenance, Repair, Overhaul) application to automate complex maintenance operations, like maintenance of an aircraft. Project name is MilTRAC. Below are the various icons I have designed with Illustrator and Photoshop.

Tank 32x32 Tank f16 32x32
Miltrac with start 64 Miltrac 64
Miltrac with start 128 Miltrac 128
Milsoft miltrac wrench 128 Miltrac rounded white backgorund 128
Miltrac with start 256 Miltrac 256
Tank 256 transparent background Tank 256 white background
Milsoft miltrac wrench 256 Miltrac rounded white backgorund 256
 Miltrac with start 512
Miltrac rounded white backgorund 512
Milsoft miltrac wrench 512
Tank 512 transparent background
Miltrac 512