Finally, "Junk Converter" can discard itself to search "Junk Synchron" and thus Special Summoned with the latter, and then can Special Summon a Tuner monster to continue Synchro Summoning
[1] Once per turn, during the Battle Phase (Quick Effect): You can take control of 1 monster your opponent controls and place it into a zone this card points to
If this card is sent from the Deck to the GY: You can target 1 "Lightsworn" monster in your GY, except "Vice, Lightsworn Archfiend"
Deck 1: Fubuki Tenjoin Style Red-Eyes Deck 1 Red-Eyes Darkness Metal Dragon 1 Red-Eyes Darkness Dragon 1 Red-Eyes Alternative Black Dragon 2 Red-Eyes Black Dragon 3 Black Metal Dragon 2 The Black Stone of Legend 1 Black Dragons Chick 2 Destrudo the Lost Dragons Frisson 2 Red-Eyes Wyvern 2 Dragon Shrine 2 Inferno Fire Blast 1 Serial Spell 1 A Wingbeat of Giant Dragon 1 Super Rejuvenation 3 Red-Eyes Insight 2 Allure of Darkness 2 One for One 2 Where Arf Thou
In fact, "once per duel" restrictions are even worse than declaring a card limited, usually, because they mean you are intentionally overdesigning a card and justifying it with an inelegant clause, when you could simply make a more fair card