Hi i have installed everything now and thought i would post some info for future searchers.
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I followed the guide online and used 18mm MDF which did involve some cutting and removal of one of the holding pins on the door card but everything fits well
the tweeters fitted on the iriginal bracket using one of the parts that came with it and i held it together with a small nut and bolt.
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i mounted my cross over up behind the dash for both speakers so it did not get mosture in the future.
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door vibration was a little annoying so i mounted foam under the speakersbefore they touch the mdf and maybe one day will install a baffle instead.
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i did not use any sound deadening but this is one for the future.
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i installed Infinity reference 6530cs from halfords at
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£99 and the depth they have is 60mm and the window works fine.
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in fact i could prob have use a smaller spacer but i was being carful, looking begind the speaker from above there is still some clearance.
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this is on a rev 5 in case anyone wonders.
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