Another Smokestacks question,
Im playing Mono-R stacks, I have a welder in play and a smokestack set to 1.
Welder is tapped and its opponents turn, beginning of my turn I untap my stuff, welder included
Beginning of upkeep, I want to weld out the Stacks set to 1, for a new stacks in the graveyard.
Not sack to the stacks, then ramp to 1.
Ideally I would do this at opponents EOT, but if I did it this way, would i still have to sack to the stacks that
I welded out even though its not in play anymore, or because the ability went on the stack it still resolves?
Almost everything in your quote above is incorrect. For ease of tracking, we'll call the Smokestack you have in play Old Smoky, and the one in your grave New Smoky. This will hopefully avoid any confusion related to the zone called "The Stack".
When your upkeep starts, before you get priority, all relevant effects trigger. Objects which enter the battlefield after this point will NOT trigger this upkeep. This means that at the first opportunity you get to weld out Old Smoky, the sacrifice trigger is already on the stack, and will resolve even after you weld (the ramp trigger is also on the stack, but will do nothing after you weld). Since New Smoky did not begin the upkeep on the battlefield, the point where it would trigger is already past. This means that New Smoky cannot gain a counter until your next upkeep.
Lastly, you reference welding on the opponent's EOT. If you weld out Old Smoky at this point in time, there is no reason for its trigger to be on the stack. Since it is your opponent's turn, the only sacrifice trigger will have been for them to fulfil. Also, since it is the EOT, that trigger will have resolved much earlier in the turn. By welding it out on their EOT, it will already be in the grave when your upkeep comes around. Neither of its abilities will trigger since it is not on the battlefield. New Smoky will be in play, and both triggers will go off (sacrifice trigger and ramp trigger). Depending on your intended goals, you may want to stack these differently, as discussed in the original question.