Block Reveal - Have I messed this up??

Right i am going to bite the bullet and remove a few blocks now, feed the insulated dpc in and rebuild. A days work now and it will give me peace of mind.

Last query is that the 225mm DPC's all seem to come with a 140-150mm insulation width as the cavity has been closed with 215mm blocks it will leave circa 25mm of insulation missing to either side. Is this a drama?
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If i am going to this effort do you recommend going all the way and cut out the 100mm cavity and install an insulated cavity closer? Is there an issue with fixing the triple slider track with a 100mm cavity? If so i will stick with the insulated dpc. Please can i get your suggestions before get on with it at the weekend?

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