Thoughts on modifying a mower to a dethatcher?

Briefly, my lawn is a mess and I cannot afford either an electric rake or dethatcher.
I have tried using a spring-tined rake to dethatch the lawn but it is too labour-intensive -
and I have around 250m2 to cover - not for the faint-hearted!

However, I do have a petrol rotary lawn mower and a spare blade. I have thought of
combining the spring-tined rake to the blade to dethatch that way.

I don't mind the thatch not being collected - as I expect it will leave the mess on the floor -
I can simply dethatch at a higher blade height and then cut/pick up the mess on a lower
blade setting.

I don't have a welding machine, nor access to one. So I wondered if the good people here
might lend me their brain cells to consider (a) what I might use as a rake on the blade and
(b) how to secure it on to the blade. I have seen one of those rakes which can be spread
at will and I thought to size it and secure it with a metal band and rivets - and then rivet the
whole thing to the blade. What do you think?

I had also thought that I could fix the rake on the opposite side of the blade. The blade is not
reversable/obversable - there is a one-way key that oreints the blade to one position only.

Please do not trouble yourselves with warnings about safety etc as I think I am aware enough
to consider this for myself - unless it is to say "don't do it". I also know about having to balance
the blade weight.

As ever, thanks for reading me and thanks for your time to reply.

willow204 years ago
if you had the blade running at a slower speed then it wouldn't need to be as well balanced