From the author’s official introduction：
That's a long teaser, let me formally introduce the new guy lol.
Those of you who are familiar with us will know that mechanical and modular DIY has always been our specialty, and the G series, will take us to the extreme.
Almost everything you can see in the video and pictures is replaceable (the logo and the parts that go with it to blend in with the exterior are all removable components).
(the logo and the parts that go with it and blend into the exterior, including the spring hole base at the bottom, are all removable components). The biggest optimization of the mechanical structure direction, in addition to the newly added guide strip, we also modified both sides of the fixed block (center column), adding 4 built-in guide balls（2.5mm）, It's also split and detachable, and you can DIY the fixing block with an appropriately sized ball of another material!So that when you slide it, the center column is no longer directly friction plate, we try to minimize the friction kinetic energy loss in the movement path。
Overall shape lines we tested a number of versions, and finally chose the current data, which is the highest physical satisfaction data we get after letting the entire team of 35 people use it, from the starting point of ergonomics, the appearance of all the grips, the force points will make you feel easier to adapt to this new member of the hand after you get on the hand.
In the position of the top cover, we reserved the amount of internal frame for the fixed block to slide, to avoid friction damping between the cover and the center column when you press your finger to slide. The slide guides on both sides are thickened by about 10 filaments and polka-dotted on the friction surface. With all these changes, you can see that every detail in the structure of our TOPG is designed to bring out the mechanical performance better.
Another important part is that we added the Rattle Tail device, as you can see in the picture, there is a space for beads at the end of the TOPG, when you put beads into the Rattle Tail device, it will produce a richer and more delicate beating sound along with the passage beating, so we named this “Rattle Tail”, of course, if you are interested in the TOPG, you can use the TOPB spring and ball to play the TOPG, so that most of the users who have bought our TOPB accessory kit will be able to use the TOPB spring and ball to play the TOPG. Of course, if you don't want it to make any sound, you can leave the beads out and fill it up as much as possible to make it your parts storage bin! We have given a lot of thought to the choice of accessories, and based on our user base, we have decided to use TOPB springs and balls for the TOPG, so that most of the users who have purchased our TOPB kits do not need to buy additional beads and springs.