Hi Vince
If you were able to see either sight gauge with fuel in it, you did not fly sufficiently un-coordinated (if at all) to starve your engine. FD's half litre is alas a tad unrealistic. When I am 101% sure of my dead stick landing abilities with zero damage (presently 70%) maybe then I will know by doing it for real.
Some forumz have a quote icon, not this forum, so cut, paste and indent if you must.
On the basis you have had a genuine engine failure, I predict you will be not only exonerated by AAIB but commended for creative lateral piloting skills
What models do you fly? I do 3d heli sh1t, sort of good average. Models are a bonus when learning to fly, and if you crash you will not die.