Only this from SOC that you probably already know.

What is the official version for that research?, i really doubt it was meant to be fit on a bigger bomber, in which year the Su-27LL-UV was tested with this device.

Official version is to test the new technologies to improve the efficiency of the modern aircrafts. It count T-10-26 or Su-27LL-UV (KS) with a round shaped TVC nozzle, T-10-16 or Su-27UB blue 08 or Su-27LL-UV (PS) with the flat TVC nozzle and Su-27LL-OS for the tests of the aft-firing R-73.

I should note the size of the flat nozzle. Su-27 is relatively big plane itself, but the experimental nozzle on it is just enormous (compared for example with the similar TF-15A). So if the purpose is only to test the flat TVC nozzle, why to do it so big? But I havent sufficiently confirmed it by my sources that it really was designed for the izdelije 54, so I am forced to say, that for now it is the plausible rumour, not fact.

Thanks for your replies guys,

I mostly wanted to know other opinions. It is clearly possible to modifly Learjet wing to have provision for hardpoints. I know – not an easy task, but nothing what cant be done. For example Finland bought them with such a provision.

Regarding to Super Ednards – see here:

http://www.naval-history.net/F40opsweek8.htm