Thanks Theo & Grumpy. The comments are appreciated. I will clean up the blade bar tonight and re-install it taking carful note about your comment about getting a straight cutting edge and not a curved one. I'll also ensure the steel doesnt get too hot.

I am curious regarding your comment about blade bars being more dangerous than normal setups and I'd like to understand a bit more about it.

I will give the mower a good test on the weekend and let you know how it goes.