Piston Extenson

• Right-click a powered, extended piston with an empty hand to cycle its extension length between 1, 2, and 3 blocks (an overlay message confirms the new length)
• Works on both regular and sticky pistons: sticky pistons pull the block back when retracting, and re-adjusting length while extended repositions any stuck block accordingly
• Adds an intermediate Piston Shaft block that fills the gap between the piston base and its head when extended more than 1 block; it behaves as an inert, unmovable connector and is removed automatically when the piston retracts
• Extension length is persisted per-piston (survives world reloads) via a SavedData-backed store
• Respects vanilla pushable/block-count rules when extending: a push that would fail on a vanilla piston (unmovable blocks, too many blocks in the chain) still fails here

Learning It

Right-clicking a piston cycles how far it pushes, and there is nothing to find: no recipe, no item, no particle. The block looks identical at every setting, so the only way anyone learns this is being told.

With village-quests installed, a mason or toolsmith wants a gate that actually opens and asks you to set a piston to a reach of three. One is what a piston already does and two could be an accident; three is unmistakably somebody who knows.

With block-tip installed, looking at a piston set to 2 or 3 shows "Pushes 2" or "Pushes 3". A piston at 1 shows nothing, since that is what every piston does.

Both are optional and guarded: without them the mod behaves exactly as before.

Pandorical

Piston Extension runs server-side, and Pandorical is required: the server will not load this mod without it. The Piston Shaft is registered as a Pandorical content block and its assets are synced from this jar.

Clients are the optional half. A player on a Pandorical client sees the shaft; because it is a real registered block, a vanilla client cannot render it and cannot receive chunks containing one. Extension length, sticky behaviour and the push rules are all server-side and unaffected.