James, Thanks for getting my post up.
Mark,
It doesn't look as bad as I thought it might!!
If you extended the front mounts so as they could be bolted to the chassis at the axle end, and filled up the holes beneath the ones you have drilled with weld you will have done the trick.
How much side plate is left above the new hole? If less than 20mm add a bit.
By removing the front section of the guard it obviously leaves a bit of tank exposed, if you decide to extend the front mounts you could add enough material to rejoin the piece you cut off to cover the tank again.
Being so close to the axle it is less likely to ground out anyway, worst scenario being full suspension compression.
By doing this not only will it give you the added strength for towing but also stop the guard being forced into the tank on hard grounding.
If you do the above you will have covered all angles and it should be fit for towing.
What sort of weights are you thinking of towing? I always try to over engineer this guards in the event of trailers with bad breaks. At the end of the day if your brakes are up to spec you should be OK.
Hope you guys don't mind me joining the forum, if there is any advise I can give I am always happy to do so.
Dave, Southdown.