Basically all you need to have in your hands for this combo to work is Junk Converter, Doppelwarrior and a tuner (preferably Cyberse Synchron).
Send Junk Converter and Cyberse Synchron to the GY, add Junk Synchron from the deck to your hand, then normal summon it. Special summon Junk Converter, then synchro summon Junk Speeder, after that, using Junk Speeder's effect special summon: Road Synchron, Steam Synchron, Fleur Synchron and Changer Synchron. Using Junk Speeder, Road Synchron, Steam Synchron and Fleur Synchron, synchro summon Red Supernova Dragon.
Once you get rid of Road Synchron and Fleur Synchron from your deck and CS from the field, you can activate RSD's quick effect (only triggers when your opponent activates a monster's effect or when they attack), banish all cards your opponent controls but also RSD too. Once this step is complete all you have to do is normal summon Junk Synchron, then special summon Junk Converter from the GY. This will trigger Doppelwarrior (must be in your hand) so special summon him, then synchro summon another Junk Speeder from the Extra Deck using Junk Synchron and Junk Converter as materials. Using Junk Speeder's effect, special summon Junk Synchron and Cyberse Synchron from the deck on to your field. Synchro summon T. G. Hyper Librarian using DW and JS, then using one of DW's tokens and CS, synchro summon Formula Synchron, then draw 2 cards. Once they're all on the field you can then freely synchro summon Stardust Sifr Divine Dragon (if you draw Synchro Chase, activate it then special summon Librarian once the synchro summon of SSDD is complete). If Red Supernova Dragon's effect is activated last turn, during the end phase: special summon him.
Reload, Magical Mallet, Reinforcements of The Army, Card Destruction and Allure of Darkness should make this a lot easier to pull off.
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