if thats how you're going to determine the nationality of a tank, then there are a few russian tanks that are really "german" as well
I'd be betting that the Canadians would argue that the FCS is whats important.
and thus, it would be a "Canadian tank"
AFAIK the engine, drivetrain and gun are still german. I think that the tracks are no longer german and are actually locally made.
the issue is that the Abrams was designed from the ground up - it was a greenfields design. The Arjun started off as a Leo2A4. In fact, put them side by side and you'd be hard pressed to tell the difference. even the viewing placements are identical.
my comment was to correct the notion that it was developed "from scratch and an entirely new design" - that is patently wrong.
However, be that as it may, it would be regarded as completely indigenous in fitment now as IA and DRDO have changed so many things over as part of a statacco development cycle. Thats been the probelm, an erratic development cycle - not the actual tank itself which was a sound robust design at interim.
It has inherited the Leos excellent ground pressure (although I'm not sure what it would be now with the larger engine). Its just a shame that it carried over some of the Leo2A4 flaws as well. In fact its better than some of the russian tanks (T-62, T-72) even though they are lighter tanks.
I think that one of the main weaknesses has also been the FCS - (arguably, the canadians make the best FCS for tanks, so maybe someone should be talking to them). The ammo compartment is a combination of the Merkava 2 and the Abrams. So its not as if India is unwelcoming of foreign designs
I'd be interested in Waylanders opinion as I guess he'd be partial to the german FCS.
As I've said constantly here, and on other forums, IMV, the problem with the Arjun lies with the project mgt cycles - and less with the issue of base platform design.