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I figured there would be others who would want to take it off.  Its now more glass looking.
I take no blame if you attack it with a scalpel blade.

If you still cant get it working you may find something on joytech updates
You may be able to flash the firmware back on the mod in case it is that that is at fault.
If you do make sure you read up on the process and dont attempt if you are unsure, if a flash goes wrong you may end up with a blank screen.

Thanks kreed I thought you had got a discount when I read 8 for less than £20 then realised it was in dollars in my cart so yes a good deal Ive got some on their way to me as well.

Well you havent had it that long as its new....Has it been working OK with the same Ti set up as used on it before?

OK reading what you are saying again and it is is both TI and NI that you have the same problem?
Has it ever worked with Ni or Ti before?

Sounds like you are trying all the things I would try.
I have just got one of these this week...Its been working well so far.
It did have an episode where the screen went do-lally and started scrolling from left to right and it was unreadable as it placed lots of wierd symbols over the screen. I paniced and pressed the fire button 3 times and the button that coresponds to the 'system off' funnction, when I switch it back on all was OK again.
I've posted a video for you of me firing some Ni coils on it so you can see what it should look like...I dont know if it will help identify what your is not doing that mine is. Should be there in a few mins from now.

The message at the end was just the 10sec timer kicking in.

Recently I swapped using disposable AA's for rechargeable versions. Ecolux does 6 for less than £5 they are only 600mAhx1.2v but I use them in camera(lasts a day out at event), and other things that take the AA. They go in the same charger as the 18650's being Mn batteries.
I was getting fed up with things like the kitchen clock runing out or the TV remote and all the other things that use that size from my res meter to my wireless keyboard the list goes on.

Sounds like non annealed wire which is harder and more springy properties.
Try lightly touching it when you have it wrapped and this will anneal the wire so it doesn't spring out of the shape you bend it. You can then put it back on the former and pull it tight and push the loops together where they will stay. Running your fingernail along the coil should be enough to separate the loops so they don't touch It will however deform much easier when threading the cotton through so a dit of twisting with the cotton will be needed.
I did this with the last coils I made using non annealed wire to get a pretty good result and once the cotton is in place it hasn't bent or moved since.
Some .3-.35 should be what you are looking for. I used .35mm wire for 4mm coils 12 wraps and they come in at .16ish each, so thinner wire will increase the res or a few more wraps will do the same.

The issues I have had with my D2 Pacer are 1). It wouldnt fire at the specified res of .05 (showing short message when firing a coil that it reads at .06)
It did work on coils that it reads at or above .08
The other issue is 2). It dosnt read the res correctly so those coils it reads at .08 are actually .1 and as a result I suspect you can bin the temp it says on the screen and adjust to what suits you. So 500F is not burning the wick and gives a nice vape.