Andrew,
Your pipes are basicly the same layout as mine in the DRB. You will like the lower tunnel height when you get around to putting in your pedals. Allow enough room to add some closed cell insulation around the pipes. I used the stuff that is used on hot water pipes and got it large enough to close around the pipes I then insulated the outside of the tunnel with Dynamat and then leather(this winter)Dynamat.com | DynaPad Under Carpet Padding
Bill
Your pipes are basicly the same layout as mine in the DRB. You will like the lower tunnel height when you get around to putting in your pedals. Allow enough room to add some closed cell insulation around the pipes. I used the stuff that is used on hot water pipes and got it large enough to close around the pipes I then insulated the outside of the tunnel with Dynamat and then leather(this winter)Dynamat.com | DynaPad Under Carpet Padding

Bill