I have the HH Explorer Delux A sym with the larger Hex fly. So far by pitching the hammock side, on as much as possibil, to the wind and rain, and pegging the fly corners down to the ground, I have mannaged to keep my down sleeping bag dry without the use of a pad.
In winter I use a double 10mm thick closed cell cheep foam double pad that I have tapered down from full width to 37 inch at the shoulders to 21 inch at the foot end the pad is 67 inch long. I rounded of all 4 pad corners by drawing around a large dinner plate and then cutting out the semi circle of each corner of the pad.
The I got two 2 meter lenghts of sticky backed velcro the soft loop velcro is 2 inch wide velco and this goes straight onto the hammock material. The hook velco is 1 inch wide this adheres to the foam matress. Put your matress inside your hammock, take some scissors with you, take the velcro with you get on your pad, then get your pad to exactly were U want it, then stick your 2 inch wide velcro about 10cm down bellow the pads to edge, you will see the angle needed to stay 10 cm from you pad edge. Then cut your 1 inch hook velco about 4 inch shorter in length and don't remove backing paper as yet, but put the hook 1 inch wide velco on to the loop, 2 inch wide velcro untill it is level and even, in the centre of the 2 inch loop velcro, then pull of backing and adhere it to your pad.
Repeat this same method again at the foot end. Hope you can understand this as im not to good at explaining things or spelling. By making the hook velco narrower and less width it stops the hooks from pulling threads in your hammock when putting the pad in and out, I just stand in my hammock slit after that, put in my pad, stretch out the hammock stick down the head end then repeat at the foot end, chuck in my sleeping bag, hang the remains of my pack at the foot enterence on a mini binner and Im all set for the night. Using a 0 to -15 degree down bag and a set of pollyprop long johns I have found this is all I need for winter snow and frosty night camping. I have not bothered with a space blanket and the velco keeps the pad in palace all night, and keeps my back warm and the pad does not end up out from under neath me during the night and I can get in and out of the hammock slit easilly still.