What about permission from Russia for upgrading? Is it required if we don’t take any components from them? Are we capable to undertake this upgrade completely in-house?The only area where India still cannot upgrade on it's own is the engine. I don't see that being upgraded as of now, at least not as part of the first block of upgrades.
They were mostly integrated with Russian assistance. I don’t know, how were changes done later?Indian SU's always had a large non russian component list.
Upgrade to Super Sukhoi would be a massive amount of work requiring expertise which may not be with HAL. That‘s an assumption. That’s why the question of Russian involvement even if we aren’t taking any equipment from them.