Once the layer of securing bricks goes in place though it really does stay put. The spring is so strong when built it kept popping the bricks out of place so I had to do a bt of one handed building whilst I held it in place. I had a few issues building the internal mechanism for the cartridge return. Admittedly I no longer part sort, I just tip each numbered bag in to a couple of plastic tubs for easy fishing through so that speeded things up immeasurably. I fully expected to have to spread this over 2 days but got it done in one rather late night session. This little beauty has been sat in my cupboard of joy for far too long and seeing as I had almost 2 weeks off work (11 days if we are being precise) I decided it was time he came out and got built. Thank you Lego for this set seriously!!! Read more I had only build two Legos sets before 2021, I was 25 when I got my first Lego set ever lol I grew up with the super Nintendo but it's still the same nostalgic feeling. I never had Lego sets growing up and now at 28 my fiancé and I decided to start buying Lego sets this year and start building them together. Other than that this set is awesome, I am half way done with the build, I'll continue in 2 days from now. That solved the problem for us and we now have 100% success rate so far. We rotate the gray Cross Block 6331441 so the flat surface is facing the front of the mechanism. That will cause the mechanism to not work at all (at least in our case we have 100% failure with this orientation. The way page 42 has it the hollow part would be facing the front of the NES. Someone recommended on YouTube to flip that piece, and that's when I notice the two sides are different. If you notice carefully piece 6331441 at the bottom cross area one side is hollow and one side is flat. They should update the instruction manual on page 42 step 49 of the NES. Well the mechanism was not working at all for 1hr we tried looking to see if she did something wrong in the build but everything was 100% correct as the instructions.

I told her that as soon as she finished building the mechanism we had to test it out. I was building the TV and my fiancé the NES. I had seen YouTube videos of the mechanism not working for so many.

Play the old super mario bros