Sir, I have read your project description. I have 8 year exp. In opencart. I have exp. In opencart upgradation, I have recently done it opencart 2.1.0.2 to 2.3 upgradtion with all your 2.1.0.2 data migrate in 2.3. also I have upgrade theme site with same color .i have done it 50+ opencart upgradation site.i have exp. In opencart theme creation, theme customization, module creation, module customization. I have 5.0 star rating with high repeated rate in opencart. I can do work perfectly. Please send me message on chat for more about discuss on project, thanks