haha, Yes specifically i use 3D caliber 900i and TC 75 Drive version these are my go to/ (well only rackets) I have now currently.
Now last entire week i had a go at tectonic 7 (one with orange color on top). strung with Lining No:1 BOOST (made in japan string) @28lbs.
PS: for some reason my friend and i did not like the string (lining No1 BOOST) – i use aerobyte BOOST on my both 900i and TC75D).
Tectonic 7 – This is rated at 84gms but i must say it felt as quick as my 75D and 900i. it was a fun and very quick racket to play with.
Now in smashing category i still felt my 900i had to give me more power than tectonic 7. This may be because 900i is more head heavy and flexible than Tectonic 7. But may be because of this high flex 900i is bit tough to be precise, many a times i felt i was going wrong when i was trying to deliver back court on side line returns.
Smashing power: 900i > Tectonic 7 > TC 75D.
Guys i am just a beginner to intermediate player – the reason i could not generate more power might be purely because of my technique. so please do try the racket your self once.
Flex Rating: the flex of tectonic 7 is more than tectonic 7 D. i haven’t tried 7D but tectonic 7 felt quite flexible and very quick.
Per lining catalog: 900i flex is 8.7 and tectonic 7 flex is rated 8.5 and for comparison tectonic 7d is rated at 8.3 and TC75D rated at 8.1.
So in terms of flex: 900i > Tectonic7 > Tectonic 7D > TC75D
Control – in this department Tectonic 7 excelled and i could control the shuttle better than with my 900i. – Tectonic 7 is as well head heavy with medium flex racket. and this has a very good feel to it.
Back court Clears – Clears are very good and its easy to clear the shuttle from back court, it did have a punch to it but i felt 900i had more punch than Tectonic 7 (feel may be different to others).
Overall, anyone planning to purchase a high end racket from li-ning try out Tectonic 7 it feels better than tectonic 7D in hand.
Rackets to try for doubles (li-ning high end) by my preference:
1. 3d Caliber 900i (Head heavy, high flex)
2. Tectonic 7 (Head heavy, medium flex)
3. Turbo charging 75i (Head Heavy, medium flex)
4. Aerounaut 7000i (head heavy, (light weight), medium flex)
5. Turbo Charging 75D (Medium Head heavy, medium stiff)
6. 3d caliber 900B (Little head heavy, Medium flex)
If you see, i prefer Instinct version of li-ning rackets – head heavy light weight and has flex to them.
PS: I heard a lot of good things about TC 75 (Instinct version) – especially on smash speed and control it could generate. but i have not got my hands on it YET .
If one is considering a li-ning top end racket – please do not go by my reviews – feel and performance of a racket depends on a players skill and fitness level. I am just a crazy guy who likes to go in-depth specs of a racket and try them out – crazy me – yeah i know, you are not the first person to tell me.
Beginners: Do not go by general notion that stiff rackets will suite you better, your technique and fitness should be good to generate power from a stiff racket.
Go for a racket which is user friendly (have bit flex on them and light weight – dont spend money on high end rackets). A sensible guidance would be to go for a cheap and good racket like APACS Z Ziggler II,Yonex Arcsaber Tour 1000, Blend duo 88 which just costs a fraction of what these lining top end will cost (or any other cheap racket which feels right to you – just borrow from others in your club and test them yourself).
Save money and spend on your shoes. its a wiser choice .