So maybe its like with Agito's belt when he goes from Burning to Shining form, it uses the same upgraded belt; although for this tech base the lockseed uses a new panel instead to achieve it. Also with this maney riders like in Ryuki, back then Kamen Rider Knight was able to achieve his final form, the Survive form and it was between episodes 20-30 before Ryuki achieved his. Of course were not sure it means the other Armored Riders will have there own K.L.S lockseeds with having a number 2 or 3 yet.