Never tried the HD line because i have all the menzerna products and there nothing short of the best.
You will be amazed what fg400 and sf4000 can do for you.
Im sure the hd cut and polish are amazing as well, however like the saying goes if it aint broke dont fix it.
But i my self only use 105 for headlight restoration anymore.
For the reasons you stated.
Get fg400 and sf4000 you wont regret it
When you buy it buy the 32oz youll regret not buying the big bottles.
The first time you use it you will say
"Where have you been all my life"
I have all the Menzerna products, and the new 3-n-1
And all the Wolfgang products except Uber as I have Menz 3-n-1 I figured it would be kind of redundant.
These are all great products but......
I have all the HD products too. For an AIO hands down imho HD Speed.
Much easier to use than 3-n-1. Please keep in mind I test these products in the high temps and humidity of a Florida summer. No ac in the garage I detail in, temps routinely over 100 degrees even with a fan blowing. This is truly a test of a polish or aio, how does it handle the humidity, the working times, drying times etc. I have had dusting issues with all the Menzerna products in the high temps and humidity down here at times in the summer.
The HD products have proven themselves more user friendly in this environment for me. Not too mention they are considerably less expensive. You can get HD Cut and Speed and have money left over compared to FG400 and SF4000 to use towards some new pads

rops:
I own and have used HD Cut, Adapt, Polish, Speed, Poxy, Touch, Express, Dress, Metal, Protect.
3D Towel Kleen for my extensive MF collection.
3D Waterless Wash :dblthumb2: This and Poorboy's are my two favorites.
These are all exceptional products imho.
I just picked up the Orange Degreaser and Pink Car soap on the Labor day sale and haven't had a chance to use them yet.
You can't go wrong with any of the above products, but your wallet will thank you for the value of the HD Products.