I just got mine as well! Mine is 82g as requested.

I must admit, from bouncing the ball on the blade, I find it hard to believe that the braking effect of the Tuvalu will be better than the Tachi as it feels so much faster!

...now with some heavy loopers
and I must admit that .... I cant hold the ball on the table..

..... It works perfect with low to mid impact...

My apologies for taking so long to post my review.

Physical inspection:
It's one beautiful blade, although this did not surprise me as the other Nexy blades I've seen are top notch too.
The finish on the blade face and edges is very fine, and the plies looked of consistent and even thickness.In the hand it felt comfortable and light... it was 82g.
Two minor negatives, which would not be hard to fix:
1. Because the finish was so fine, it actually made the edge feel sharp, which bothered me a little at one point against my finger. Although many blades have this, I personally tend to appreciate if manufacturer smooth out the edge near the neck of the blade. Nothing I can't do myself, so not a big deal.
2. As others have mentioned as well, the logo on the back is an issue, since I was also testing with a red OX rubber, and the logo would clearly shine though making it illegal. Thanks to theoldduffer I also used some acetone to remove it

I put a sheet of Tibhar Dtecs on the backhand, as this is my usual rubber so it's good for comparison. On the forehand I tried a few rubbers, but the best was Armstrong Hikari SR7 Chop 1.0mm I'll get into later why this worked so well.

Forehand: Quite fast and seems to work well with a variety of rubbers. The dwell time is not that high, so a high spin rubber works best if you want to power-loop. The blade has a nice solid feel when you hit the ball, and it offer good feel. Although looping was good, it wasn't until I put the Armstrong rubber on there when I realised this blade is great for hitting. First I tried to hit hard with it, and I wasn't too impressed, but when I hit at medium pace my accuracy was fantastic and the blade produced plenty of pace.
Although using a 1mm rubber really limits from looping, using any soft/medium sponged tensor should work great for hitting too, and gives a lot more potential for looping.

Backhand: This was definitely a little faster than what I'm used, which has pros and cons. For aggressive pushing the blade worked fantastic. The harder pushes produced more reversal and the control was still quite good. When there's little or no spin on the ball you can still do an aggressive push with a downwards or swiping action... very effective.

Blocking was very effective too, although against fast loops I struggled a little to keep it on the table as the blade is more bouncy than the Tachi+, and although the braking effect of the Tuvalu was evident, it does not feel as strong as the Re-Impact blades. For slow to medium pace blocks, it produced a low ball with good reversal.... very effective!
Could I get used to it... yes I probably could. The aggressive pushing felt more effective than with the re-impact, which could force weaker loops from the opponents, which are easier to control. I think I'd need to be sharper and more on my game, which would allow me to take advantage of the more offensive power of this blade.

Chopping worked fine too...brushing the ball produced very good reversal and the higher speed of the blade required less effort to get it back onto the table. With sponge I suspect the higher speed will be even more handy.
Even away from the table, the forehand was powerful enough to produce fast loops or hit, which is where most balsa blades struggle.

In conclusion, the Tuvalu is a beautifully made blade, and is very suitable for the style that it's designed for. I would recommend a spinny tensor (with 2.0mm or less sponge) for the forehand, and a slow OX long pimple for a close-in game, or a sponged long pimple for the backhand.