CSCART V3 product features admin modifications

CSCART Modifications I need to expand Cs carts Product Features capability as it is limited. My Cart has a lot of product features which are becoming difficult to manage. Allow nesting of product groups Allow duplication of product feature names (collision control needed) Allow product features to be disabled for certain groups(similar to how you can do so with product groups already) Will need import fields updated to reflect the changes (CSV import) Need to make sure code doesn't have unintended consequences for the platform (VERY IMPORTANT) Need code changes released to me in case we patch the platform later and we loose our changes Current way of CSCART product feature nesting: Group Feature Feature Feature Feature Needed nesting: (unlimited nesting needed) Group Group Feature Feature Feature Feature I want only Developers who have experience writing custom code for CSCART version V3, you must have examples for V3 as this project needs someone who knows what they are doing.