I've got one on the LCR too, bargain off ebay! Theres a cut out in the bottom corner of the heatshield to allow a duct through to the filter. I tried to get the standard plastic one to fit but couldn't get the sheild to sit properly so will run a seperate feed up sometime. Have found that there is still a heatsoak
problem when it was on the rollers before Christmas, but no worse than with the standard box on.
For £230 i couldn't justify it, mainly cos i feel i could make the sheild at work and buy a JR filter for £20 at inters, but for the £50 i paid, it saved some work!