Sir, I have read your project description. I have 8 year exp. In opencart.i have exp. In module creation ,cusmization, upgradtion.i have exp. In any opencart extenstion 1.5.6.4 to 3.0.2.0.i have check it extenstion wich u metion in the project description. I can do work perfectly extenstion upgradation. 1.5.6.4 to 3.0.2.0.i have recently done it 1.5.6.4 to 3.0.2.0 opencart upgrdation with all module upgrade.i already upgrade this module 1.5.6.4 to 3.0.2.0 in previously client. 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. Please send me message on chat for more about discuss on project, thanks