Good day all,

Please help with the following tune.  I have an Opel/Vauxhall Astra OPC/VXR.  Mods are, GT28 turbo, 875cc injectors, std MAF (but intake modified for turbo cold side), std throttle body, decat, external BOV and Wastegates, forged pistons and rods.
The N75 valve has been connected for this setup i.e. no no external boost control.
I am looking to achieve a very mild 250wkw from this setup.  I have loaded the v1.05 map attached and have not driven the vehicle but instead monitored data on idle only.
The issue: 
> STFT gradually rise to -25% after resetting to 0% then starting all over again rising to -25%
> LTFT show 0%
> If the throttle is blipped then a puff of blueish, white smoke is seen from the exhaust
> Idle is steady at around ~815 - 875 mark
> See screenshots attached
The car has been burning very rich previously resulting in the plugs needing to be changed.
Could the STFT be due to the adaptions not been switched on in the software?  OR
Is there an error in the way in which I switched off the rear O2 sensor?
could it be a boost leak because vac boost @ idle is around 0.6bar -  I know it should be 0.8bar
Been struggling with this car for a year now.  Just want to get it back on the road with a safe, drivable map

TIA

Note that:
CWLAMFAW = 00 00 00 00 in standard map so it was left as is