D40 rear Ironman springs

I have a 2006 D40 auto and have been trying to fit some ironman springs to the rear. I am wondering if anything has changed with the later models from the earlier ones.
My original springs have bush sizes of 39 mm Outside diameter and a 14 mm inside diameter,front and rear. The ones supplied by ironman have a smaller eye at the rear, 33mm and the supplied bushes have a 19mm inside diameter but my shackles are a 14mm diameter. I can possibly fit Ironman shackle kit to overcome the problem, but I shouldn't have to do this.
Has anyone else had this problem?? or can offer some advice.

i didnt have a problem when fitting it to my 2010 st

This happen to me when i had my ironman put in. i put ironman shackles in the rear hole but they put a bolt (it looks like a bolt to me) in the front it cost me an extra $40

ONLOCK, I suspect this may only be a problem on 2006 early 2007 models. The Ironman dealer has a 2008 D40 and his has the 19mm bolt hole.

thats what it sounds like to me aswell. maybe ask your local nissan dealer to clarify if you really need it otherwise maybe just run the ironman shackles