Thanks for the responses guys!
OK. Got the MI FF quad rail mounted. I left the handguard cap on. There was going to be too big of a gap to remove it. The hg cap was round, so it doesn't really look bad. Overall, I am pleased with MI two piece FF quad rail. It seems to be rock solid and the overall appearance is good. Installation was a snap and only took a few minutes. I would rather it be a bit longer to cover where the HG cap is instead of leaving the cap on, but I figure they did it this way to make the installation easier. I feel that if you are competent enough to dremel off the delta ring, spring, and lock ring, then you should be competent enough to knock out three pins and clip off the hg cap, but I digress. I'll give the Midwest Industries, AR15 Gen2 Free Float Mid-Length Handguard #MCTAR-21G2 a thumbs up.
Perhaps, if I get some time, I will post some before and after pics.