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Get the gauges in mate, then get put a dawes and needle valve in. Install a catch can, then block the EGR. Some say CRD's on't need a Dawes but atleas with a Dawes fitted, you get to decide on your max boost and with a needle valve in you can control the spool up rate of the turbo and get it going even better.
But block the EGR last after everything. As blocking the egr you may get some boost increase and with a dawes fitted you can control it, the ECU won't know what the hell is going on and play funny buggers. Actually, check to see if the EGR is already blocked. You never know, it maybe already....