Hey Everyone,
Thanks for all the replies - this forum is great for being so responsive. Thought i'd post a little update from Thailand. The instructor i chose to train here was both a PADI & TDI tec instructor - after a long discussion, couple of fun dives with him and after he let me flip through both PADI & TDI manuals, we decided to go down the TDI route for my Tec pathway. The instructor gave me the choice as for him it didn't matter from a teaching perspective - his expectations for a Tec candidate was the same. However, I found the structure & progression of the TDI curriculum better suited for me.
On Sunday, I completed my TDI Intro to Tec, Advanced Nitrox & Decompression Procedures courses (believe this is equivalent to the PADI 45 with respect to the allowable depth). I would be doing a couple of Tec fun dives to 45 m this week to gain more experience. I also bought Tec fins as per the instructor's advice and will be using it on all dives going forward (tec or not) - the same goes with maintaining TRIM, using frog kicks, back kicks & helicopter turns.
My experience with this course changed my perception of what good diving means. It made me realize a lot of people I know who claim themselves to be experienced & good divers are actually not. Good diving is all about solid fundamentals - buoyancy, TRIM, fin propulsion techniques and not forgetting the basic skills you learn (S-drills, valve drills, deploying SMB, gas switch procedures, buddy breathing bottom gas/deco gas etc). One good thing being an engineer, i loved the manual dive planning calculations - i think it is important to develop a feel for the numbers and not just rely on what your dive planning software churns out for you.
To summarize my experience - wow, it was like doing my first open water diver course again! Tec diving requires strong fundamentals and a good instructor will expose your flaws & work with you to improve them. Be prepared to put in all the hard work coz it would be a hectic week managing the dives & knowledge reviews. Good luck to everyone out there who plans to venture into the world of tec diving - definitely will make you a better diver.
Cheers,
Anand